Gahagan in Missouri

I am searching for info on Tom Gahagan who married Lizzy Gamache in Ill. they came to Missouri and had at least 2 daughters Maggie my g- grandmother and Frances.Maggie married Arthur Mier and Frances married a Thomas. They lived in Cook Co. Ill. in late 1800's. Please e-mail me if you have info I have not found any info on this family. e-mail is lindseymlindsey@cs.com ThanksSherrill