Fletcher Jamison was a good friend of John Taylor and his photos appear in Taylor's books. His double was a .500-450 Holland Royal until he retired it for a .500 Jeffery bolt gun (due to an injury that made it difficult for him to open a double).
"The Best in Double Rifles and African Hunting"
Thanks to all of you who purchased one or two or all three of my double rifle books. As of today's date I have the remaining books in s...