In the modern era the boundaries of the Forest were not set until 1750, by which period several Bishops' Peculiars were reassessed for land valuation and redistribution. Some land in the north-west of the county was ceded to Shropshire, and some land in the east to Worcestershire. However, in the south-west the Golden Valley lands were confirmed as "Herefordiensis" (Herefordian). A unique source for the history of the county is the Chained Library at Hereford Cathedral which contained some of the earliest printed books in Europe, printed by the Gutenburg press. During the English Civil Wars it acted as a royal treasury.