I just received this very welcome email from Gib Darling's granddaughter, Sally:
Here is a little information on Gib.
His full name was Henry Gilbert Darling
Born Feb. 5, 1901 in Wellington, New Zealand
Gib grew up in Redlands, Ca.
He died in Toms River New Jersey on July 2, 1990
Art Education: California School of Fine Arts, San Francisco, Ca.
Employed by Patterson & Sullivan( later named Patterson & Hall) in San Francisco until 1939, then free lanced in New York City
until the late 1950's. Gib ended his career at the Bates agency in New York City in 1984 at the age of 83.
He was Vice President of the Society of Illustrators in 1953 & 1954.
He was always known as Gib and never "Gil"
I've made the necessary revisions and add this link to his work which appeared a couple of months ago in April.