Looking for info on John and Ann Harley 1800s Ireland and Boston

I'm looking for information on my gggrandparents, John and Ann Harley. They emigrated from Ireland, separately or together, in the mid-nineteenth century and ended up in Boston MA. They had at least one daughter, my ggrandmother Mary Elizabeth Harley, who later married Charles J. Doherty. She was born around 1866 in Boston. If anyone has any knowledge or connections to these Harleys I'd like to hear from you. Pattie Shook