I am researching my Walsh family who settled in Grand Rapids, Kent County, Michigan sometime between 1847 and 1850. Thomas and Mary Walsh (sometimes Welch) are listed in the 1850 Michigan census with their children Patrick, Edward, John, Nicholas, William, James & Mary (could we get any more generic!?) who were all born in Ireland (according to the census) with Mary being the youngest born circa 1846. What would be the most likely port for someone settling in Michigan? I have no idea where in Ireland they came from. Any help would be greatly appreciated. This is my first foray into passenger lists, etc.