Leitrim-Roscommon

I am trying to find the birth place and time of Francis Beirne born 1856?in Roscommon as listed in the 1891 census for Liverpool.He married Mary Grant? in Roscommon or even Liverpool in1890?. Also information on Mary Grant? please,Mary may have been married prevously to Patrick Tyman and had two children Patrick born 1876? and Catherine born 1890,I presume Patrick also believed to be Irish died in 1890 but can not find any record to date. Francis and Mary went on to have two further chidren Margaret born 1892 and Elizabeth born 1896 both in liverpool.Any help would be most grateful.

don't know if this is connected or not but my researching found the names patrick beirne and bridget beirne as witnesses for john gray and honoria connor wedding in ballinameen church feb 1,1875.