The Wealth of Nations by Part 5 Chapter 2 Page 15

The care of his stables was committed to the lord constable and the lord marshal.

His houses were all built in the form of castles, and seem to have been the principal fortresses which he possessed. The keepers of those houses or castles might be considered as a sort of military governors. They seem to have been the only military officers whom it was necessary to maintain in time of peace. In these circumstances the rent of a great landed estate might, upon ordinary occasions, very well defray all the necessary expenses of government.

In the present state of the greater part of the civilised monarchies of Europe, the rent of all the lands in the country, managed as they probably would be if they all belonged to one proprietor, would scarce perhaps amount to the ordinary revenue which