Hi. I have been through the Manningtree and Mistley parish registers and there are numerous Carrington baptisms across both. Families seem to use both parishes for different births within the same family. Their occupations range from mariner (a few) to a shoemaker, a farmer and a labourer.
Your John and Eliza Anne baptised Emily 16/11/1879 and John 31/3/1878 in Manningtree. they were living in Ardleigh and John was a farmer.
I did find a Hannah Carrington baptised in Mistley to a Thomas and Sarah Carrington 13/8/1825. Thomas was a mariner.
I have written down all the baptisms I could find for Carringtons in these parishes from about 1770 to 1895, so when you know what you want, post again on here - there's too many for me to write them all up on here!!!