Between Ancestry.com and Google maps I had a pretty good idea where it was located. Some of the roads listed on the map couldn't be traveled on or were private but we found it anyway.
Records on Ancestry basically gave this info:
-Skippack, adjacent to Mennonite Church
- Estate passed to daughter Dorothea Hallman Heizer... may not be correct...
-Owned a farm of 150 acres
- One part stated son Henry was left land in Skippack " I also give and Devise unto my said Son Henry Hallman all my Land Plantation with the Appurtenances and--Improvements thereunto belonging or otherwise Appertaining thereto, Situate Lying and being in the township of Skepack and Perquiomy aforesaid containing as by Estimation about one Hundred and fifty Acres, be it more or less"
-It's at the crossroads of Kratz and Evansburg
It turns out the farm attached to the house is a stable that offers riding lessons. It's called Three Diamond Stables. We tried to ask about the owner's, but there were only two men there that spoke little English. We were able to understand that the owners were away on vacation. We tried again on our way back to the Philly airport. No luck. But there's a website for the Three Diamond Stables. And there's a greenhouse next to the house called Marie's Garden, and that also has a website. So before my next visit to Pa, I'm going to try and contact them.
Also on the way back from the airport, we found the Old Trappe Lutheran Church. The one that Anthony helped build.