I don't know if this will be of any help. I checkedaround trying to locate Charles W. and did not find one I thought might fit. But did find the following , in case you had not seen it before, and I hope it might help.
1880 Phil PA dist 502 image 17 163/174Caroline Eckel 25PA Mary Park28Boarder " Amanda Chapman 22Boarder" Sales Lady Mary P""2Boarder "
Mary P Chapman's age about right.
There was a Richard Park in 1870 Phil age 57 Maryage 20 Cornelia19 Amanda15(Ages not right on, but somwtimes that happens a lot)