A little more information is now to hand which may help readers.
Prior to Redbourn, he lived at Stags End which is about 3 miles away. In that area the six inch O.S. maps show 3 Baptist Chapels. One is in Crown Street, Redbourn and is described as 'General'. Another on Redbourn Common is described as 'Particular'. A third is at Gaddesden Row and is described as 'High Calvanistic'. T.