You may already have this info as your message is a couple of years old.
Edmund Alchin was born at Chart, Kent and baptised at St Michael's, Chart next Sutton on 6 November 1836. He was the son of Thomas Alchin of Linton (1809-1877) and Sarah Hatcher.I have only been able to find Edmund in one census - 1861 when he was a groom at Boxley. There is no sign of him in any other census.
PS Thomas Alchin of East Malling born 1808 lived at Camberwell where he was a gardener.