He edited the Inventories and Valuations of the King's Goods, published in 1972, based on an inventory of the possessions of Charles I originally compiled in around 1639 by the first Surveyor, Abraham van der Doort.
He updated the List and Valuation of the King's Property, released in 1972, drawing from an original inventory of Charles I's possessions created in approximately 1639 by the inaugural official responsible for managing the royal estate, Abraham van der Doort.