Thanks for the reply, Allan. My William Kilby was born 1836 as we have found death records and an obituary (NSW BDM's). It does not give DOB just age at death 72yrs. He married a Elizabeth Elms (b. 1844 on the ship "Fairlie")in 1864 Bathurst NSW. There is no record of his parents names so we presume he came to Australia alone. On one database I found a William born 1836 Hertfordshire parents James & Susan, but can't confirm this is him. There is an extensive family tree from him onwards and information on this branch of Kilby's. Unfortunately we don't have any arrival details for him. There in lies our brick wall. I have checked all the shipping passenger lists I can find on-line for anything to do with Kilby's into NSW around that time but no luck yet. Any help would be appreciated. Thanks Leanne.