[8] Henderson was most proud of his work in the Agriculture portfolio, although reviews from the farming community and his department staff were often less than flattering.
He was re-elected with a landslide majority in the 1981 election, and was named Provincial Secretary for Resource Development on February 13, 1982.
Henderson supported Frank Miller to succeed Davis as party leader in 1985, and did not campaign in that year's election.
When the Charlotte Eleanor Englehart Petrolia Hospital in his constituency received a $160,000 donation in 1975, Henderson delivered it with the line, "Me and the premier brung you this cheque".
He also possessed a remarkable ability to remember people's names after having only met them once and would often set-up appointments on Saturday afternoons with constituents.