Hi Joanne,
have you had a look at my public tree (Field Family v2)? My grandmother was Florence May Hymas (1902-82), and I grew up in Great Baddow. Whilst I do not think that I have any specific info on the Hymas' ref'd below I'm sure they'll be closely linked as I have seen other Hymas's in the G Baddow census records. I had traced my line back fairly well to the 1810s in Rayleigh, Essex where an uncle from my line (Wm Hymas 1806-89)ended up going out to New York and then Utah as part of a Mormon settlement. Whilst I had known nothing of this previously it proved v useful as the Americans have done a lot of ancestry digging and have apparently got the line back to Johannis Hymus b1555 in Ashdon, Essex, rgds, ?Jon.