If one rejects the testimony of his associates, including P. S. L. Johnson and C. Woodworth, one must provide solid reasons for doing so. We see no grounds upon which to reject their testimony
I used to have some of P.S.L. Johnson's books in his 'Epiphany' series. I found it an insightful read, as I think they give a view of what the thoughts and beliefs of the early Bible Students which were not printed in WT literature. Johnson was one of the early 'Pilgrims', a person who traveled as a sort of evangelist to the various Bible Student ecclesias by their request (a bit like a circuit rider). He was very popular as a speaker and had quite a following, later breaking away and starting the LHMM. He was definitely an intelligent person, though by modern standards his writing comes across as odd and a bit loony. It is clear from his writing that he and the Bible Students of the time believed Russell to be 'that servant', and that Russell tacitly agreed. No question.