I do no have specific info on this family, but I do have another AGNEW/GRAHAM family of the same period. One is Nancy or Agnes AGNEW who married John AGNEW (interesting!)in 1845 and lived in Limnaharry Ahoghill parish Antrim co Ireland. Nancy GRAHAM was born 1821-1822 and her father is Thomas of Corbally of the same parish. The following is the specifics -
MARRIAGE: Marriage Record of 1st Presbyterian church Ahoghill film#IP/64 (seen in Belfast), 29Mar1845 John AGNEW son of Robert AGNEW Limnaharry, to Nancy GRAHAM dau of Thomas GRAHAM Corbilly, in her fathers house, present were James WEIR and William GRAHAM.