With his family William raveled from England aboard the ship S. Curling in 1856.  His profession on Mormon Migration is listed as marble polisher.  The family surname is spelled "Stoddard" on theaBOUT ship manifest. The Ellsworth Journal lists all of the Stoddart (two families) traveling together, with Robert at the head, although they are all listed together, note that there were two separate Stoddart families - Robert and Margret with their three children (Dinah, James, and Mary), and William and Margaret with their seven children (Caleb, Hannah, Jane, Margaret, Mary, Robert, and Sarah).  They are also listed as separate families in the PEF Ledger (though both families appear on the same page).