A couple of things on Pocono Manor's 7th hole, all of 77 yards.
It still exists...the lodge/hotel burned to the ground last year but the golf course, at least for now, is still operational.
Second, if Donald Ross was ever there, they have absolutely no evidence of that, nor do any contemporaneous newspaper accounts suggest that. The original nine holes was designed by Herbert Barker and opened in 1911 and the additional nine was designed by William Flynn about a decade later. The 7th was one of his holes, but on the hole drawing it is listed as 115 yards, likely from a tee that was never built along the cliff's edge.