One of the courses on the list, North Palm Beach CC aka Palm Beach Winter Club, is one I'd like to revisit.
The EoG cites this as a Raynor and notes it as his last design, but if you look at the newspaper accounts from that time credit is given to William Langford.
Philadelphia Inquirer - Jan. 11, 1925
Palm Beach Post - March 26, 1925
The timing of these articles, early 1925, suggests the course was not the same course noted as the reason for Raynor's early 1926 visit to Palm Beach, and the organizers associated with the club are not Paris Singer.
Instead, it seems more likely that Raynor was visiting Palm Beach in connection with the plans for a different course that was being constructed for Paris Singer, that being the course to be located in the Cragin Park area of Palm Beach.
Palm Beach Post - Dec. 20, 1925
Evening Post - March 12, 1926
The course at Cragin Park was to be built in connection with Singer's plans for his Blue Heron Hotel which would be located just across a new causeway on Singer Island (you can see the Blue Heron Hotel noted on the plan above with the road in question now being named Blue Heron Boulevard). The Blue Heron Hotel project did get underway, but Singer's misfortunes resulted in a cessation of construction, with the bones of the partially constructed building remaining for quite some time.
http://historicpalmbeach.blog.palmbeachpost.com/2010/09/02/test/So to sum up, Raynor never had anything to do with North Palm Beach aka Palm Beach Winter Club. Instead, he was working on the Cragin Park course, work that was interrupted by his death and later completed (at the least the lay out on the ground) by Banks.