Lake Lefferts, Revisited

I've updated my article on Lake Lefferts to include the name of the person for whom the lake was named. I have some questions for my readers, though. The lake was formed in 1928 by damming Matawan Creek, but Jacob Lefferts was only a teenager then, so does anyone know when the lake was actually named for him? Presumably Mr. Lefferts did some real estate development in Matawan in the 1950's-1960's, perhaps the development of the fine lakefront? Seems to me the lake was already named Lefferts when I moved to the area in 1978, so it wasn't named in his memory since he didn't die until 1989. Tougher still, did the lake have a name between 1928 and whenever it became Lake Lefferts?

Also, does anyone have details about the large boarding house or academy pictured above? It is in such a nice location on Lake Lefferts, why hasn't it become a fancy condominium development or exclusive senior center? I'd be interested in postings or emails about that as well.