The Duke indeed was so poor that a younger son, simply to add his efforts to those of the rest, was compelled to pass his days in mountain climbing in the Himalayas, and the Duke's daughter was obliged to pay long visits to minor German princesses, putting up with all sorts of hardship.

And while the ducal family wandered about in this way--climbing mountains, and shooting hyenas, and saving money, the Duke's place or seat, Dulham Towers, was practically shut up, with no one in it but servants and housekeepers and gamekeepers and tourists; and the picture galleries, except for artists and visitors and villagers, were closed; and the town house, except for the presence of servants and tradesmen and secretaries, was absolutely shut.

But the Duke knew that rigid parsimony of this sort, if kept up for a generation or two, will work wonders, and this sustained him; and the Duchess knew it, and it sustained her; in fact, all the ducal family, knowing that it was only a matter of a generation or two, took their misfortune very cheerfully.
The only thing that bothered the Duke was borrowing money.

This was necessary from time to time when loans or mortgages fell in, but he hated it.

It was beneath him.