I am trying to find any possible immigration information on a Michael J. DUGGAN b. about 1816 in Ireland and his wife, Margaret or Mary Margaret ROACH, born about 1826 in Ireland.
They are found in the 1856 Iowa State Census in Julien, Dubuque, Iowafor one of the first times.
I do not know when or where they married but I do know that the three children that they had -John, Julia & Michael J.- were all born in Dubuque. I do know that they were practicing Catholics as I have copies of the christening records of two of the children.
I presume that they may have come through New Orleans and up the Mississippi but any information or advice would be helpful.