The collection comprises property in p. Oswestry, Shropshire; in p's Wrexham, Gresford, Holt, Llangollen, Llandysilio-yn-Iâl, Llanarmon-yn-Iâl, Llandegla, Llangedwyn, Llanarmon Dyffryn Ceiriog, Llansilin, Erbistock, Ruabon, Marchwiail, Llanfair Dyffryn Clwyd, Llanfwrog, Llanbedr Dyffryn Clwyd, Llanynys, Llanhychan, and Ruthin, co. Denb.; in p. Llanrhaeadr-ym-Mochnant, cos Denb. and Mont.; in p's Bangor Is-coed and Overton, co. Flint; and in p's Llansanffraid-ym-Mechain, Pennant, Llanfyllin, Hirnant, Llanwddyn, Llanfihangel-yng-Ngwynfa, Llangadfan, Llanfair Caereinion, Llanerfyl, Garthbeibio, Cemais, Llanwrin, Machynlleth, Penegoes, Darowen, Llanbrynmair, Carno, Llanwnnog, Trefeglwys, Llanidloes and Llangurig, co. Mont. These properties were formerly to be found in the following estates or collections: Oswestry or Llanforda estate, Llansilin collection, Llwydiarth estate, Arwystli collection, Manor of Cyfeiliog collection, Llangedwyn collection, Wynnstay collection and the Vale of Clwyd/Ruthin estate collection. Farm and cottage rents are also contained in a separate series of Farm and cottage receiving rentals, 1864-1925. Until 1885 (R140/1a), the rentals below are arranged according to whether the estates were held in fee simple, tail male or tail general, whereas the properties in the separate series of Farm and cottage receiving rentals are arranged according to the more familiar pattern of estates (Llangedwyn and Llanforda rents, Wynnstay and Ruthin rents, Llwydiarth rents, Cyfeiliog/Llanbryn-mair rents, Glan-llyn rents). Collectors: Thomas Adey Cox, 1863, William Jones, 1863-1872, Owen Hughes 1872-1880. From 1865 (R120/1a) onwards, property in p. Llanbadarn, co. Card., is included. From 1868 (R123/1a) onwards the Glan-llyn estate collection is included (except for the chief rents), consisting of property in p's Llanfor, Llanycil, Llanuwchllyn, Llangower and Trawsfynydd, co. Mer., and from 1878 (R133/1a) in p. Pennal, co. Mer. From 1874 (R129/1a) onwards, property in Bishop's Castle, Shropshire, is included, and from 1877 (R132/1a) onwards, property in p. Tilston, Cheshire.