Many of us now alive can remember the beginning of what is called the sanitary movement, previous to which era, as nothing was said about the wretched dwellings of the poor, nobody thought of them, nor were the ill consequences of their dirty, crowded rooms, and bad ventilation at all appreciated. At length the idea struck somebody, who wrote a pamphlet about it, which the public did not read; but as the author sent it to the newspaper editors, they borrowed the hint, and took up the subject, the importance of which, by slow degrees, penetrated the London mind. Now, amongst the sources of wealth possessed by Mr Benjamin were a great many houses, which, by having money at his command, he had bought cheap from those who could not afford to wait; and many of these were situated in squalid neighbourhoods, and were inhabited by miserably poor people; but as these people did not fall under his eye, he had never thought of them--he had only thought of their rents, which he received with more or less regularity through the hands of his agent. The sums due, however, were often deficient, for sometimes the tenants were unable to pay them, because they were so sick they could not work; and sometimes they died, leaving nothing behind them to seize for their debts. Mr Benjamin had looked upon this evil as irremediable; but when he heard of the sanitary movement, it occurred to him, that if he did something towards rendering his property more eligible and wholesome, he might let his rooms to a better class of tenants, and that greater certainty of payment, together with a little higher rent, would remunerate him for the expense of the cleaning and repairs. The idea being agreeable both to his love of gain and his benevolence, he summoned his builder, and proposed that he should accompany him over these tenements, in order that they might agree as to what should be done, and calculate the outlay; and the house inhabited by Glegg and his daughter happening to be one of them, the old gentleman, in the natural course of events, found himself paying an unexpected visit to the unconscious subject of his last experiment; for the last it was, and so it was likely to remain, though three months had elapsed since he made it; but its ill success had discouraged him. There was something about Mary that so evidently distinguished her from his usual customers; she looked so innocent, so modest, and withal so pretty, that he thought if he failed with her, he was not likely to succeed with anybody else.