"In the decades before land reform in Ireland the Leitrim Estate was one of the largest in County Donegal, and included large swathes of land in the West of Ireland as well as Donegal, where the family ran their affairs from their seat at Manor Vaughan outside Carrigart. "
http://www.donegallibrary.ie/memory/leitrim.htmThere a possible marriage for Martha's parents- Robert Piper, son of Isaac Piper, married 4 Aug.1859 Aughnish Co. Donegal to Margaret Snodgrass, daughter of William Snodgrass.
Some of their children-
1. Robert born 5 Dec.1864 Ramelton district, Co.Donegal (father given as Robert William Piper)
2. Sarah born 14 May 1867 Kilmacrenan, Donegal
3. Rebecca Ann born 25 June 1869 Kilmacrenan, Donegal (page 284 in civil register)
4. James born 10 Oct.1871 Kilmacrenan, Donegal (page 270 in civil register)
5. Isaac born 11 Feb.1874 Kilmacrenan, Donegal
6. Margaret born 25 Jan.1877 Co.Donegal
7. Catherine born 25 Jan.1877 Fogher
8.
George Montgomery born 29 Sept.1878 Fogher, Donegal
https://www.familysearch.org/#form=advanced-records