Good luck. Looks promising. You might have a hybrid site there and the date is older. The shallow pitched roof does look like 1860-1870, but the two that I have permission that look similar shape were both listed 1820, one actually being 1798, also have a roof like that. Guess what, the 1820's both have those same 4 chimney's on the corners. Your permission there might be listed as the date the back addition was added. I got 12 sites this weekend lined up and I'm gonna pound them too. Super stoked, like you. Hoping to get out before the snow coming Tues, which I have no idea what is predicted. Four are not on the old maps. One is there with no name listed. Hoping for some bucket listers to come my way. I'm overdue. Hope some come your way too.