I keep coming back to John Lake. (https://www.findthemissing.org/en/cases/4386/0/) The chin sticks out to me. Granted, a year and a half is a long time to be missing before being found in NH. His son made this site: http://www.johnlake.com/resources.html for his father and some information that Eric made. There is also a thread on Websleuths dedicated to John Lake as well (https://www.websleuths.com/forums/showthread.php?69580-NY-John-Lake-37-New-York-City-10-Dec-1967).