[2] He also taught his dispensational approach of the Bible with lectures throughout Great Britain, the Netherlands, France, Canada and the United States.
[3] When he left school at 14 Welch entered the leatherwork trade, his father's occupation, and remained in the industry until 1904, age 24.
Afterwards Welch was offered a position at the Bible Training College of London as part-time general secretary.
As his knowledge of the Scriptures grew, Welch disagreed with the direction of the Bible Training College which was forming a primitive church based upon the Sermon on the Mount and Acts chapters 1 and 2.
As a result of this conflict, Welch resigned in 1907 and began meeting with a small Bible study group.
After his resignation from the Bible Training College in 1908, Welch read an article in Dr. Bullinger's "Things To Come" which he believed contained an anomaly; namely, if Israel had been set aside in God's plans at Acts 28:24–28 (approximately 62 AD), then the epistles of the New Testament written before and after this event should reflect such a change.
Welch wrote to Bullinger and soon met with him to discuss the relation of Paul's 14 epistles to the boundary line of Acts 28.
Then they both "discussed implications that arise from observing the relation of Paul's epistles to that boundary line" as follows:[5] Although Dr. Bullinger died four and half years after the meeting, his last book, Foundations of Dispensational Truth[6] reflected his understanding and acceptance of the division of the Pauline epistles written before and after the Acts 28 dividing line.