collected by Ffolliott, Rosemary. Game Licences in North-West Ulster in 1802. Continuing list of Game Certificated printed originally in the Londonderry Journal of 24 Aug. 1802, covering Londonderry, and Co. Donegal. Article in The Irish Ancestor, vol.VIII, no. 2. 1976, pages 84-86, Family History Library Ref. 941.5 B2i v7-8.
A Muster Rolle of ye Province of Ulster, dated 1630, serves as a census substitute. An abstract is available for free online:
Mervine, William M. "The Scotch Settlers in Raphoe, County Donegal, Ireland: A Contribution to Pennsylvania Genealogy," The Pennsylvania Magazine of History and Biography, Vol. 36 (1912):257-272. digital version at Internet Archive - free.