We can trace the origins of all the Emptages in the UK at the time of the census in 1841 back to three places in Kent: the Isle of Thanet, the Isle of Sheppey or Dover.
But between 1560 and 1840 there were many baptisms elsewhere, both in the wider Kent county and outside of Kent including the London/Surrey/Middlesex areas. What happened to those children and to their descendants?