Phi;ip, don't forget that Basil and Catherine Geraghty also had a son James, born about 1846. When he married Margaret White in February 1873 he gave his age as 26. He died in Durham Lodge in 1904, aged 58.
I can get a marriage cert for Eliza Aldwell Sandys in 1860, do you think it would be of any help? She must have been quite young and also it is peculiar that she married in Banbridge, Northern Ireland.
Pedigree of Sandys of Derham Lodge, Co Roscomon, 1788-1924. GO MS 172: 215
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Durham Lodge (H5040)
Elizabeth Sandys advertised for sale "Durham Lodge" and 39 acres in July 1854. The Sandys house was valued at £3 in the 1850s and in 1906. This house was held in fee by William "Sands" at the time of Griffith's Valuation. It is not named on the 1st edition Ordnance Survey map but is shown as Durham Lodge on subsequent editions. A farm is still extant at the site.
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Edwyn Sandys Reynolds, a Protestant gentleman, resided at "Darham" in 1749. Robert Sandes was living at Sandfield House, barony of Athlone, in county Roscommon in the early 19th century. By the mid 19th century a Sandys family also held some land in Derrane, barony of Ballintober South, including Durham Lodge. James Sandys of Durham Lodge owned 158 acres in the 1870s.