This article pioneers the use of a new source for the study of post-medieva
l land markets. Copyhold transactions for the extensive manor of Slaidburn
(Lancashire) survive in an unbroken series from 1520 to the early twentieth
century. The transactions have been entered into a database which allows t
he landholding history of individuals (and so of families) and of individua
l units of landholding to be traced, and aggregative figures for changes in
the size of the land market over time to be produced. The database can als
o produce rentals for any date, allowing for a detailed analysis of the cha
nging distribution of land within the manor. Preliminary figures are presen
ted which reveal, for instance, that the mean size of units of land sold in
ter-vivos was persistently smaller than those inherited. Using both documen
tary rentals and database-generated rentals, a strong tendency towards cons
olidation after 1650 is demonstrated, but the land market in each of the fo
ur townships proves to have been different in character. Marked variations
in the price of land are described and the place of mortgages in the land m
arket are discussed at length.