I'm not sure if all of the information about the Wolf Run, PA post office is quite right. According to Jim Forte's Postal History Website, the Wolf Run, PA post office was in operation from 1841-1889. As of December 27, 1889, the Wolf Run, PA post office was renamed Pennsdale, PA, as documented in this excerpt from the Postal Bulletin:

I did find a connection with the area (Pennsdale) and the addressee M. Alice Good, and the "in care of" D.M. Keller of Williamsport, PA, as documented below:
Quote:
MICHAEL GOOD, eldest son of Daniel and Catherine (Helfrich) Good, was born near Allentown, June 7, 1813. In 1855 he purchased the homestead farm near Penn's Dale, and improved it by the erection of entirely new buildings. He was an active supporter of the public school system, and labored earnestly to promote its efficiency in his district. In politics he was a stanch Republican. He was a member of the Lutheran church, as were also most of the members of his family. On the 28th of October, 1841, he married Sarah, eldest daughter of Valentine Beeber, of Muncy, and they reared ten children: Harriet Elizabeth, deceased; Daniel Franklin, insurance agent, Lock Haven, who served a short time in the war of the rebellion; John Irvin, deceased; George Helfrich; Michael Horace, farmer, Aurora, Nebraska; William Valentine, miller, Lackawanna county, Pennsylvania; Sarah Jane, wife of D. M. Keller, veterinary surgeon, Williamsport; Mary Emma, deceased; Charles Rollin, veterinary surgeon, Look Haven, and Margaret Alice, of Williamsport. Michael Good died on the 6th of June, 1877, at the age of sixty-four years, followed by his wife on the 15th of December following at the age of fifty-eight.
The addressee, M. Alice Good (a/k/a Margaret Alice Good) died in 1930 as documented here:
http://www.findagrave.com/cgi-bin/f...id=110212265