A volume originally containing seventeen numbered manuscript maps, with acreages, of the Trewern estate in the parishes of Llanddewi Felffre and Narberth, Pembrokeshire, Llangynin, Llanboidy and Llanwinio, Carmarthenshire, and Blaen-porth and Llangoedmor, Cardiganshire, by Alfred Thomas, land surveyor, 1826. The original foliation was disturbed, probably during rebacking, so that the index and map and acreages no. 1 are now ff. 36-40, and three maps (nos 9, 10, 12) have been lost. Two other maps, 1880s, of farms in the parish of Llanddewi Felffre have been tipped in (ff. 29, 34) and details of acreages added on the blank leaves of the original volume. Other later additions, 1873-1893, include plans and details of acreages of farms in the parish of Meidrim, Carmarthenshire (ff. 31 verso-3, 42 verso-3).