Apologies for the plug!
"The Surgeoners, another grand old stock, had a Scottish origin...By industry, perseverance and laudable ambitions they always maintained themselves in a high rank"
- Robert Sibbett's "On The Shining Bann" might be out of date and out of print but it's a good read, with much detail on Portglenone history and familes. NIFHS (North of Ireland Family History Society) sell a CD version.