The book-keeper lays down the pen which he has just dipped in the ink, and disappears in the little room. Mr. Flint is turning over the leaves of the invoice book. "In thirteen pages there are no less than two blots and five erasures. You have grown careless in your penmanship lately;" and Mr. Flint closes the book with a report like that of a pocket-pistol, and opens it again. One would suppose the office-boy to be shot directly through the heart; but he survives, and is attacked with a wonderful fit of industry. "Do you write in your sleep?" inquires Mr. Flint, with a quiet insolence. Mortimer thinks how often he has toiled over those same pages at hours when he should have been sleeping--hours taken from his life. But he makes no reply. He only bites his lips, and lets his eyes flash. Suddenly a thought strikes him, and, bending over Mr. Flint's shoulder, as if to examine more closely his careless chirography, he takes a small key from an open drawer in the _escritoire_ behind him, and drops it into his vest-pocket. After receiving a petulant reprimand, Mortimer returns to his desk; and again that weary, weary pen scratches over the paper. After the bank deposit is made up, and Mr. Flint looks over the bill-book, and startles the orphan from a state of semi-somnolency, he goes on 'Change. He is no sooner out, than Mortimer throws Tim a bit of silver coin. "Get some apples for yourself, Tim." Tim (he's small of his age) slides down from the high stool with agility, while his two eyes look like interrogation points. He is wondering at this sudden outbreak of munificence, for though "Mr. Mortimer" always had a kind word for Tim, and tried to extricate him from the web of mistakes which Tim was forever spinning around himself, yet Tim never knew him to come down with the "block tin" before, as he eloquently expressed it; and he looks at Mortimer all the time he is getting his cap, and pauses a moment at the door to see if he doesn't repent. When Tim's feet cease sounding on the stairs, Mortimer goes into the back office, and with the key which he had taken from the drawer, unlocks a small iron hand-safe. His trembling fingers turn over package after package; at last he finds one which seems to be the object of his search. This he hastily conceals in the bosom of his coat. After carefully re-locking the safe, he approaches the _escritoire_ to return the purloined key, but to his dismay he finds the drawer locked. The one above it, however, is unfastened. Drawing this out, he places the key in its right compartment. Mortimer, in searching for the paper which he has hidden in his bosom, had removed several others from the safe; but in his nervousness he had neglected to replace a small morocco case. He discovers his negligence, and hears foot-falls on the stairs at the same moment. There is no time to re-open the chest: he wraps the case in his handkerchief, and resumes his place at the desk.