I'd be curious to see those plans, too. The current name of the new course, Militia Hill, is Tillinghast's convention. He was, if I am not mistaken, a member of Philly Cricket, which makes his original plan all the more interesting.
Curiously, H&F have claimed that there course embodies a number of Tillie design principles, particularly the bunkering, which they claim resembles that of SFGC. I'd be curious to evaluate that claim for myself.
18 at Philly cricket (Wissahickon/Flourtown), although changed over the years, is still one of my favorite closers.