When they took a young man into Tellson's London house, they...

When they took a young man into Tellson's London house, they hid him somewhere till he was old. They kept him in a dark place, like a cheese, until he had the full Tellson flavour and blue-mould upon him. Then only was he permitted to be seen, spectacularly poring over large books, and casting his breeches and gaiters into the general weight of the establishment.