David Copperfield by Charles Dickens Chapter 57 Page 13

‘s Officer who had effected the capture. On his release, he embraced me with the utmost fervour; and made an entry of the transaction in his pocket-book — being very particular, I recollect, about a halfpenny I inadvertently omitted from my statement of the total.

This momentous pocket-book was a timely reminder to him of another transaction. On our return to the room upstairs (where he accounted for his absence by saying that it had been occasioned by circumstances over which he had no control), he took out of it a large sheet of paper, folded small, and quite covered with long sums, carefully worked. From the glimpse I had of them, I should say that I never saw such sums out of a school ciphering-book. These, it seemed, were calculations of compound interest on what he called ‘the