Just a quick update on wills -
The scanned images of wills for Northern Ireland 1858-1900 went online (free) yesterday on the PRONI website - these are linked to the indexed Will Calendars for 1858-1943 (i.e. the detail available for E&W to ancestry.com subscribers).
This link takes you straight to the image of John Upton of Tullyrusk's will and may help you tie up your family to their relatives who remained behind in Co Antrim. It names his wife, 3 sons and 5 daughters as well as describing the family's farms. There were over 700 Co Antrim Graham wills so I'll leave you to trawl through them for possible matches! Good luck
http://applications.proni.gov.uk/DCAL_PRONI_WillsCalendar/WillsSearchImage.aspx?id=174240