Not a day passed on which Rosa did not come to have her chat with Cornelius.

The tulips, concerning whose cultivation Rosa was taught all the mysteries of the art, formed the principal topic of the conversation; but, interesting as the subject was, people cannot always talk about tulips.

They therefore began to chat also about other things, and the tulip-fancier found out to his great astonishment what a vast range of subjects a conversation may comprise.

Only Rosa had made it a habit to keep her pretty face invariably six inches distant from the grating, having perhaps become distrustful of herself.

There was one thing especially which gave Cornelius almost as much anxiety as his bulbs -- a subject to which he always returned -- the dependence of Rosa on her father.

Indeed, Van Baerle's happiness depended on the whim of this man. He might one day find Loewestein dull, or the air of the place unhealthy, or the gin bad, and leave the fortress, and take his daughter with him, when Cornelius and Rosa would again be separated.

"Of what use would the carrier pigeons then be?" said Cornelius to Rosa, "as you, my dear girl, would not be able to read what I should write to you, nor to write to me your thoughts in return."

"Well," answered Rosa, who in her heart was as much afraid of a separation as Cornelius himself, "we have one hour every evening, let us make good use of it."

"I don't think we make such a bad use of it as as it is."

"Let us employ it even better," said Rosa, smiling. "Teach me to read and write. I shall make the best of your lessons, believe me; and, in this way, we shall never be separated any more, except by our own will."

"Oh, then, we have an eternity before us," said Cornelius.

Rosa smiled, and quietly shrugged her shoulders.

"Will you remain for ever in prison?" she said, "and after having granted you your life, will not his Highness also grant you your liberty? And will you not then recover your fortune, and be a rich man, and then, when you are driving in your own coach, riding your own horse, will you still look at poor Rosa, the daughter of a jailer, scarcely better than a hangman?"

Cornelius tried to contradict her, and certainly he would have done so with all his heart, and with all the sincerity of a soul full of love.

She, however, smilingly interrupted him, saying, "How is your tulip going on?"

To speak to Cornelius of his tulip was an expedient resorted to by her to make him forget everything, even Rosa herself.

"Very well, indeed," he said, "the coat is growing black, the sprouting has commenced, the veins of the bulb are swelling, in eight days hence, and perhaps sooner, we may distinguish the first buds of the leaves protruding. And yours Rosa?"

"Oh, I have done things on a large scale, and according to your directions."

"Now, let me hear, Rosa, what you have done," said Cornelius, with as tender an anxiety as he had lately shown to herself.

"Well," she said, smiling, for in her own heart she could not help studying this double love of the prisoner for herself and for the black tulip, "I have done things on a large scale; I have prepared a bed as you described it to me, on a clear spot, far from trees and walls, in a soil slightly mixed with sand, rather moist than dry without a fragment of stone or pebble."

I looked with interest upon this man, who was accused of being the perpetrator of a crime of violence. He was flaxen-haired and handsome, in a washed-out negative fashion, with frightened blue eyes, and a clean-shaven face, with a weak, sensitive mouth. His age may have been about twenty-seven, his dress and bearing that of a gentleman. From the pocket of his light summer overcoat protruded the bundle of endorsed papers which proclaimed his profession.

“We must use what time we have,” said Holmes. “Watson, would you have the kindness to take the paper and to read the paragraph in question?”

Underneath the vigorous headlines which our client had quoted, I read the following suggestive narrative:

“Late last night, or early this morning, an incident occurred at Lower Norwood which points, it is feared, to a serious crime. Mr. Jonas Oldacre is a well known resident of that suburb, where he has carried on his business as a builder for many years. Mr. Oldacre is a bachelor, fifty-two years of age, and lives in Deep Dene House, at the Sydenham end of the road of that name. He has had the reputation of being a man of eccentric habits, secretive and retiring. For some years he has practically withdrawn from the business, in which he is said to have massed considerable wealth. A small timber-yard still exists, however, at the back of the house, and last night, about twelve o’clock, an alarm was given that one of the stacks was on fire. The engines were soon upon the spot, but the dry wood burned with great fury, and it was impossible to arrest the conflagration until the stack had been entirely consumed. Up to this point the incident bore the appearance of an ordinary accident, but fresh indications seem to point to serious crime. Surprise was expressed at the absence of the master of the establishment from the scene of the fire, and an inquiry followed, which showed that he had disappeared from the house. An examination of his room revealed that the bed had not been slept in, that a safe which stood in it was open, that a number of important papers were scattered about the room, and finally, that there were signs of a murderous struggle, slight traces of blood being found within the room, and an oaken walking-stick, which also showed stains of blood upon the handle. It is known that Mr. Jonas Oldacre had received a late visitor in his bedroom upon that night, and the stick found has been identified as the property of this person, who is a young London solicitor named John Hector McFarlane, junior partner of Graham and McFarlane, of 426 Gresham Buildings. E. C. The police believe that they have evidence in their possession which supplies a very convincing motive for the crime, and altogether it cannot be doubted that sensational developments will follow.

“LATER. — It is rumoured as we go to press that Mr. John Hector McFarlane has actually been arrested on the charge of the murder of Mr. Jonas Oldacre. It is at least certain that a warrant has been issued. There have been further and sinister developments in the investigation at Norwood. Besides the signs of a struggle in the room of the unfortunate builder it is now known that the French windows of his bedroom (which is on the ground floor) were found to be open, that there were marks as if some bulky object had been dragged across to the wood-pile, and, finally, it is asserted that charred remains have been found among the charcoal ashes of the fire. The police theory is that a most sensational crime has been committed, that the victim was clubbed to death in his own bedroom, his papers rifled, and his dead body dragged across to the wood-stack, which was then ignited so as to hide all traces of the crime. The conduct of the criminal investigation has been left in the experienced hands of Inspector Lestrade, of Scotland Yard, who is following up the clues with his accustomed energy and sagacity.”