The Edison Menlo Park, N.J. lab is at Greenfield Village in Dearborn, Mi. It was reconstructed from old pictures there in the '20's as the original had been closed 40 yrs before in NJ and the original buildings had calapsed.

There are a lot of pictures of Henry Ford and Thomas Edison camping together and doing various other consolidated ventures. There was most probably a business relationship but a publicity/advertising relationship also.