Question: Was the third volume of the first edition deemed sufficient?
Sentence: The third volume of that first edition was published in 1987, but was already being superseded by a second, revised edition of the entire work, greatly aided through the advice and assistance of then Yale doctoral candidate Grant Hardy, Dr. Gordon C. Thomasson, Professor John W. Welch (the head of FARMS), Professor Royal Skousen, and others too numerous to mention here.
Answer in sentence: yes