I am trying to trace a William Allan who lived in Cathcart, Renfrewshire in the 1871 & 1881 census. I can find no trace of William, his wife Catherine & children Catherine, Margaret, John, william, James, Mary, Agnes Donald and Janet in the 1891 census. Catherine and some of the children are in the 1901 census in Cathcart, Lanarkshire but there is no sign of William. I also can't find a date of death for him. William was born about 1841 in Old Monkland. Any help would be appreciated.