If you need information on an ancestor or place add a message and keep returning to check if anyone replies. You can also leave any comments on the Lurgan Ancestry itself.
Have you any more info about Capt Henry Mercer?
Contact Lurgan Library http://www.ni-libraries.net/app/Directory/LibraryDetail.asp?LocationID=119 Local librarians in the north of Ireland are very helpful and there is no charge for their services.