The secret of the coloured chalks was this. Not long ago there lived in the house an artist who strove to earn a living by painting on the pavements of the city the impossible salmon and the equally impossible sunset. But though he used the most lurid colours he did not find himself appreciated, and, taking a liking to Gracie, he poured into her ears tales of disappointed ambition and unrecognised genius, to which she listened with sympathetic soul. Emulous of his gifts she coaxed him into giving her a few lessons, and in a short time could also paint the impossible salmon and the equally impossible sunset. One day he said, "Gracie, I am leaving this wretched country, which is not a country for artists. I bequeath to you my genius and my stock of coloured chalks. But do not deceive yourself; they will bring you only disappointment, and do not blame me if you die unhonoured, and unwept, and unsung." With these despairing words he bade her an affectionate, if gloomy, farewell. Gracie did not share his despair, and had little understanding of the words in which it was expressed. The legacy was a God-send to her and to the children whom she would enthral with her flights of imagination, with coloured illustrations on the deal table.

She related to them now some weird tale of a beautiful young princess-(behold the beautiful young princess, with vermilion lips and cheeks, green eyes starting out of her head, and yellow hair trailing to her heels) – and a gallant young prince-(behold the gallant young prince, with vermilion lips and cheeks, staring green eyes, and yellow hair carefully parted in the middle) – mounted on a fiery steed-(behold the fiery steed, its legs very wide apart, also with green eyes, vermilion nostrils, and a long yellow tail) – who, with certain wicked personages, went through astounding adventures, which doubtless would all have come right in the end had Gracie not been seized with a fit of coughing so violent that she fell back in her chair, spasmodically catching and fighting for her breath.

Two persons mounted the stairs at this crisis, a man and a woman, and both hastened their steps at these sounds of distress. Mrs. Death flung the door open and hastened to Gracie's side not noticing Dick, who followed her.

"My dear child-my dear child!" said Mrs. Death, taking her clammy hand and holding the exhausted girl in her motherly arms.

"I'm all right, mother," gasped Gracie, presently, regaining her breath. "Don't you worry about me. There-I'm better already!" She was the first to see Dick, and she started up. "Mother-look! The gentleman from the police station! Have you found father, sir?"

"I beg your pardon for intruding," said Dick to the woman. "I came to speak to you, and when I was wondering which part of the house you lived in I heard your little girl coughing, and I followed you upstairs." He gazed in amazement at the astonishing pictures on the table. "Did Gracie draw these?"

Six little heads popped up from the bed, and six young voices piped, "Yes, she did. Ain't she clever? And she was telling us such a beautiful story!"

"Be quiet, children," said Mrs. Death; and turning anxiously to Dick, "Have you any news of my husband, sir?"

"I am sorry to say I have not," he replied; "but your visit to the magistrate is in the papers, and good is sure to come of it. Have you got a teaspoon?"

With a pitying remembrance of Gracie's cough he had purchased a bottle of syrup of squills, a teaspoonful of which he administered to the child, who looked up into his face with gratitude in her soul if not in her eyes.

"It's nice and warm," she said, rubbing her chest. "It goes right to the spot."

"Let her take it from time to time," said Dick to Mrs. Death. "I will bring another bottle in a day or two. Now can I have a few words with you about your husband?"

"Yes, sir, if you'll step into the next room."

"I like brandy balls," cried Connie.

"So do I-so do I!" in a clamour of voices from the other children.

"And so do I," said Dick. "You shall have some."

"Hush, children!" said Mrs. Death. "I'm ashamed of you! I hope you'll excuse them, sir. Keep them quiet, Gracie, while the gentleman and I are talking. It doesn't do, sir," – this in a low tone to Dick as he followed her into the adjoining room-"to speak too freely before children about trouble. It will come quickly enough to them, poor things!"

Dick nodded. "I wish you to believe, Mrs. Death, that I earnestly desire to help you out of your trouble, and that I may be of more assistance to you than most people. I say this to satisfy you that I am not here out of mere idle curiosity."

"I am sure you are not, sir, and I'm ever so much obliged to you for the kindness you've shown. The syrup of squills has done Gracie a lot of good already; but I don't see how you can help us."

"It may be in my power, if you will give me your confidence."

"I'd be sorry to throw away a chance, sir. What is it you want to know?"

"I want you to tell me the reason why Mr. Samuel Boyd discharged your husband."

"There's not much to tell, sir. Where shall I commence?"

"On Friday morning, when your husband went to the office: and don't keep anything back that comes to your mind."

"I won't, sir. He went away as usual, and it was our belief that he had given Mr. Boyd every satisfaction. I told you at the police station how we had hopes that Mr. Boyd would lend us a few pounds to get us out of our difficulty with the moneylender. I'm afraid every minute of the home being sold over our heads. We've only got a few bits of sticks, but we shouldn't know what to do without them. Mr. Boyd's a hard master, sir, and regularly every Saturday, when he paid my husband his wages, he grumbled that he was being robbed. My poor husband worked for him like a slave, and over and over again was kept in the office till ten and eleven o'clock at night without getting a sixpence overtime. It wasn't a bed of roses, I tell you that, sir; nothing but finding fault from morning to night, and he was always on the watch to catch my husband in some neglect of duty. On Friday afternoon, when he went out of the house on some business or other, his orders to my husband were that he was not to stir out of the office; if people knocked at the street door let them knock; he wasn't to answer them, but to keep himself shut up in the office. Those were the orders given, and my husband was careful to obey them. Two or three hours after Mr. Boyd was gone there came a knock at the street door, and my husband took no notice. The knock was repeated two or three times, but still he took no notice. Presently he heard a step on the stairs, and he thought it was Mr. Boyd come back, and who had knocked at the door to try him. It wasn't Mr. Boyd, sir. The gentleman who came into the room was Mr. Reginald."

Taken by surprise at this unexpected piece of information, Dick cried, "Mr. Reginald!"

"Mr. Boyd's son, sir. He and his father had a quarrel a long while ago, and Mr. Boyd turned him out of the house."

"But if the street door was not opened to Mr. Reginald, how did he get in?"

"He had a latchkey, which he told my husband he had taken with him when his father turned him off."

A light seemed to be breaking upon Dick; all this was new to him. "At what time did you say Mr. Reginald entered his father's house?"

"It must have been about six o'clock. When he heard that his father was not at home he said he would wait; but my husband begged him not to, and asked him to go away. He seemed so bent upon seeing his father-he used the word 'must,' my husband told me-that it was hard to persuade him, but at last he consented, and said he would call again at ten o'clock, when Mr. Boyd would be sure to be alone."

The light grew stronger, and it was only by an effort that Dick was able to suppress his agitation. He recalled the conversation he had had with his uncle the previous night at the police station, and the remark that towards the elucidation of the mystery there were many doors open. Here was another door which seemed to furnish a pregnant clue, and it terrified him to think that it might lead to a discovery in which all hopes of Florence's happiness would be destroyed.

"Yes," he said, "at ten o'clock, when Mr. Boyd would be sure to be alone."

"Then my husband, remembering the caution given him by Mr. Boyd that nobody was to be allowed to enter the house during his absence, asked the young gentleman not to mention to his father that he had already paid one visit to the house. You see, sir, my husband feared that he would be blamed for it, and be turned away, as the other clerks had been, for Mr. Boyd is of that suspicious nature that he doesn't believe a word any man says. The young gentleman gave the promise and went away."

"Did Mr. Reginald say why he wanted to see his father?"

"Not directly, sir; but my husband gathered that the young gentleman had come down in the world, and was in need of money."

"Ah! Go on, please."

"When Mr. Boyd came back he asked if any one had called; my husband answered no. 'Then no person has been in the house while I was away?' he said, and my husband said no person had been there. Upon that my husband was surprised by his being asked to put his office slippers on the table, and was still more surprised to see Mr. Boyd examining the soles through a magnifying glass. Oh, but he is a cunning gentleman is Mr. Samuel Boyd! And when the examination was over he gave my poor husband his discharge, without a single word of warning. My husband was dumbfounded, and asked what he was being sent away in that manner for. Then the hardhearted gentleman said he had set a trap for him; that before he left the house he had put on the stairs eight little pieces of paper with bits of wax on the top of them, so that any one treading on them would be sure to take them up on the soles of his boots; and that when he came back six of the eight pieces were gone. It was an artful trick, wasn't it, sir? My poor husband did then what he ought to have done at first; he confessed the truth, that Mr. Reginald had been there. When Mr. Boyd heard that his son had been in the house he got into a fearful rage, and said that Mr. Reginald and my husband were in a conspiracy to rob him, which, of course, my husband denied. He begged Mr. Boyd to take back the discharge, but he would not listen to him, and the end of it was that he came home brokenhearted. You see our home, sir; wasn't the prospect of not being able to earn bread for us enough to break any man's heart?"

"Indeed it was," said Dick. "And that is all you can tell me?"

"It is all I know, sir."

"I think you said last night that it was about half-past nine when Mr. Death went to Catchpole Square the second time."

"As near as I can remember, sir."

"Within half an hour," he thought, "of Mr. Reginald's second visit." "Thank you, Mrs. Death," he said; "you may depend upon my doing my best to clear things up, and you shall soon hear from me again. I may call upon you without ceremony."

"You will be always welcome, sir, but it's a poor place for you to come to."

"I don't live in a palace myself," he said, with an attempt at gaiety. Taking his rope and grapnel, still wrapped in the evening paper, he held out his hand to wish her good-night (with the kind thought in his mind of sending a doctor to Gracie), when a man's voice was heard in the passage, inquiring in a gentle voice whether Mrs. Death lived there.