There is a fair bit spoken of JSG around page 600 in Noel, vol 2;
In 1920 there was a further secession from the London (Raven-Taylor) party. Mr. J. S. Giles who had while in Sydney been rather active in opposing Glanton's action in 1908, found matters of teaching in the London party becoming so serious that in 1920 he with others were practically forced out after 40 years of fellowship with them. .... So these faithful brothers learned ten years later what many others had learned in Sydney and elsewhere in 1910, that it was a question of agreeing with all that was said or done by the Raven-Taylor leaders, or getting out. So in the year 1920, some 20 or 25 meetings that agreed with Mr. Giles and refused the new teaching, went out, Mr. Giles along with them; to continue together in what they had before believed and accepted.