I have a rose flood born c1843 in Ireland but settled in england. The dates are several years out and i dont know wether you suggest that she settled in usa or were you referring to your gggrandfather ?
Incidently, i am very interested in the surname cassidy from county leitrim ireland. Are you connected to them ? I am stuck with my ggrandmother Bridget Cassidy daughter of a james cassidy. Bridget born c 1818 leitrim. i know its a long shot but i am always on the look out ! regards kevin machell - Manchester England