Neville teaches the Bible for twenty-five years
Date (happened)
before 1935
bound · possible
Reasoning
In the certainly-dated 1959-09-08 lecture, Neville states he has taught the Bible for 25 years. This describes an ongoing/lifelong practice rather than a punctual occurrence, so per the lifelong-pattern rule it yields a bound from the telling rather than an exact happening date. Even treating '25 years' as an approximate figure, the practice must have begun by roughly 1934-1935, so a before-1935 bound is warranted.
Told / reported
8 September 1959
estimated
Reasoning
The statement about teaching the Bible for 25 years was made from the platform in lecture 1058, whose delivery date is certain from two independently corroborating claims; the telling therefore dates to 1959-09-08.