The first group of documents deposited in 1976 comprises: deeds and documents, 1357-1963, including deeds relating to the Jones family of Llanloddian and Llandysilio, and the Harrison family estates in the counties of Denbigh and Montgomery, 1504-1912; the Pugh of Llanerchydol estates; the Naylor-Leyland estates in co. Montgomery, 1706-1965, including the estates of Pugh of Brynllywarch, Kerry and the Leighton estate; Naylor family (Liverpool deeds), 1694-1850; Guilsfield and Manafon, 1727-1898; Llandysilio and Llandrinio, 1721-1864; Trefnanney estate (mainly the Rocke and Mytton families), 1709-1908; miscellaneous estates, 1618-1919, (mainly Welshpool, Guilsfield and Castele Caereinion, co. Montgomery, and a few co. Merioneth deeds); the Pennant and Glanhafren estates, co. Montgomery (Pryce Buckley and Andrews families), 1642-1955; Dugdale family (Llanfyllin and Llanrhaeadr ym Mochnant, co. Montgomery), 1788-1874; Morris family of Pentrenant, Churchstoke, 1600-1823; Walton family (Cwmllecoediog estate, parish of Mallwyd, counties of Merioneth and Montgomery, and some co. Lancaster material, 1662-1910; Walton family (co. Lancaster, with a few from co. York), 1796-1918; miscellaneous deeds from co. Montgomery, 1543-1901; Pryce family, Cyfronydd estate, 19th century-1929; miscellaneous small groups (Baxter, Glyn and Vaughan families), 1674-1922; John Williams of Plas Tanyrallt, co. Caernarfon, and Vownog, Llanfyllin, co. Montgomery, 1683-1858; miscellaneous deeds, co. Salop, 1546-1915; miscellaneous deeds in Wales, England, Scotland and Ireland, 1438-1917; miscellaneous papers (mainly relating to public matters in co. Montgomery, including highways, savings banks, canal shares, the 1847 Montgomery Boroughs election, 17th century newsletters), 1687-1886; legal and monorial documents, 16th c. -18th c.; miscellaneous documents (wills, bonds, receipts, appointments etc.), 1589-1942; Troughton family, co. Warwick, including records relating to the coal and iron mines, 1614-1906; printed latter, mainly sale catalogues, 1767-1910; miscellaneous deeds and documents, mainly relating to co. Montgomery, 17th c-20th c; Naylor-Leyland correspondence, 1907-1917.

The second group, deposited and listed in 1980, comprises documents deriving from p. Forden, co. Mont., 1654-1856, many relating to the Lloyd family; further deeds and documents, 1722-1922, mainly deriving from properties in Forden, co. Mont.; documents relating to p. Chirbury, co. Shrop, 1725-1919, some concerning the Humphreys family; miscellaneous documents, 1679-1847, relating to co. Mont., mainly in p's Montgomery and Llandysul; deeds and documents, 1694-1926, concerning properties in p's Kerry and Llandysul, co. Mont., some relating to the Bank House Estate; documents, 1610-1845, concerning property at Churchstoke and Montgomery, co. Mont.; deeds, 1715-1853, relating mainly to properties in p. Kerry, co. Mont., some deriving from the Turner family estates; deeds, 1656-1867, relating to properties in p's Churchstoke and Castle Caereinion; deeds and documents, 1709-1862, concerning the Trewern and Varchwel estates, mainly in p's Buttington and Llanfair Caereinion; deeds, 1739-1913, concerning properties in p's Llandrinio and Llanllwchaearn, co. Mont., etc.; deeds and documents, 1611-1885, relating to properties at Welshpool; deeds and documents, 1762-1916, relating to properties in p's Llandinam, Manafon, Berriew, co. Mont.; documents, 1792-1955, relating to the Leyland-Naylor estates, and to the Harrison family, 1839-1947; deeds and documents, 1637-1891, from numerous parishes in co's Mont. and Shrop; miscellaneous deeds and documents, 1357-1936, from a large number of p's in co. Mont.; deeds and documents, 1625-1892, relating to properties mainly within Guilsfield and Welshpool, co. Mont.; miscellaneous papers, 1546-1931, mainly concerning the Morris family of Pentrenant, many concerning the p. of Churchstoke, co. Mont.

The supplementary group deposited in 1991 comprises deeds and documents, 1673-1963, relating to properties in p's Welshpool, Manavon and Berriew, co. Mont.; deeds and documents, 1859-1946, relating to properties in p's Welshpool, Berriew, Churchstoke, Llanfair Caereinion etc.; deeds and documents, c.1727-1929, relating to properties at Llanfechan, Llangynniew, Berriew, Llansaintffraid, Guilsfield, Welshpool etc., some relating to the Glanhafren estate; documents, 1683-1858, relating to properties in a large number of parishes in co. Mont.; correspondence and papers relating to Thomas Jones of Llantysilio, 1787-1836, to Major Robert J. Harrison, Llantysilio Hall, Llangollen, 1810-1841, and miscellanea, 1704-1872; legal papers, 1823-1833; and miscellaneous legal and financial papers, 1685-1912, of Montgomeryshire interest.

The fourth group, deposited in Sept. 2000, comprises deeds and documents, 1775-1978, relating to properties in p's Berriew and Guilsfield and in the town of Welshpool, all co. Mont.