Originals
1-6, 17, 18
Close (my understanding),
12, 13, 14, 15
I'd love to find that Karakung was also Wilson (the course was opened in 1927), but haven't been able to verify. News accounts on opening day strangely didn't mention a designer. Since Wilson did the work pro-bono, it could be a case where he laid out both in 1916, but the second wasn't built until the demand required it. Still, I doubt it. Other city courses built within the next few years (Juniata, Walnut Lane) used Alex Findlay as the designer, although I'll admit that Karakung doesn't look like his work.
As far as Wilson features, the problem is that he did so few courses that's it's difficult to generalize. The bunkering work at Cobbs is pretty rudimentary, which is more support for the fact that the White Faces at Merion are more Bill Flynn's than anyones. Ron Whitten came across some info that indicated that Wilson was not much of a bunkering guru, and even the Seaview Bay course that Wilson created had Ross in a few years later to completely revise the bunkering.
That being said, there are similarities to what you see at Merion. You see a routing that tends to follow the ground and topography in a very logical, unforced manner. You see extremely creative use of the creek, (on #3 it wraps around the green in a very similar fashion to 11 Merion), on 5 it splits the fairway diagonally, creating a wonderfully option oriented hole, and on 6 it fronts the green tightly on the short pitch. There is also the same dramatics used on both courses, with the 17th of each being a long par three into an almost amphitheater setting.
I agree that a complete restoration of Cobbs Creek would be a wonderful thing, but I think the odds are probably pretty long.