It was a successful but skeptical businessman of 18 that he stepped into a dingy basement to see if a handful who met there had anything more sensible than the creeds of the churches.
Sounds like a quote from Watchtower or Proclaimers book.
*** w73 7/1 p. 394 par. 5 Organized to Praise God ***(as seemingly written by Russel himself without quote reference......)
Seemingly by accident, one evening I dropped into a dusty, dingy hall in Allegheny, Pa., where I had heard that religious services were held, to see if the handful who met there had anything more sensible to offer than the creeds of the great churches. There, for the first time, I heard something of the views of Second Adventism, by Jonas Wendell . .
And
Zion’s watchtower, July 15, 1906, p. 230.
Gradually I was led to see that though each of the creeds contained some elements of truth, they were, on the whole, misleading and contradictory of God’s Word. Among other theories, I stumbled upon Adventism. Seemingly by accident, one evening I dropped into a dusty, dingy hall, where I had heard religious services were held, to see if the handful who met there had anything more sensible to offer than the creeds of the great churches. There, for the first time, I heard something of the views of Second Adventists, the preacher being Mr. Jonas Wendell, long since deceased. Thus, I confess indebtedness to Adventists as well as to other denominations. Though his Scripture exposition was not entirely clear, and though it was far from what we now rejoice in, it was sufficient, under God, to re-establish my wavering faith in the divine inspiration of the Bible, and to show that the records of the apostles and prophets are indissolubly linked. What I heard sent me to my Bible to study with more zeal and care than ever before, and I shall ever thank the Lord for that leading; for though Adventism helped me to no single truth, it did help me greatly in the unlearning of errors, and thus prepared me for the Truth.
Therefore not quite a source from outside
Cheers
Borgia