John Willcox Letters of Administration

Today I found online copies of the book listing the administration of the estate of John Willcox (hatter) at the following link: https://familysearch.org/pal:/MM9.3.1/TH-1942-28805-336-15?cc=1999196&wc=MDSD-DZQ:268496701,268496702

Transcription:

"Robert Fairlamb Admor: of John Willcox dec. Sept 30, 1820 #655.

Letters of Admon: on the estate of John Willcox late of Middletown Dec.: were this day granted in due form to Robert Fairlamb he having given security according to law in the sum of five hundred dollars signed Benjn. Pearson Regr."

The administrator is listed as Robert Fairlamb. I don't know much about "letters of administration" yet, but apparently an administrator is someone who is responsible for dealing with an estate under certain circumstances, for example, if there is no will or the named executors aren't willing to act. An administrator has to apply for letters of administration before they can deal with an estate. Letters of administration were granted "in due form" to Robert Fairlamb "having given security according to law in the sum of five hundred dollars."

I am trying to find some family connection to the Willcoxes, but as of yet haven't come up with anything. From the Encyclopedia of Pennsylvania Biography, Volume 2, (pp. 578-579) I found:

• Robert Fairlamb was the son of Frederick Fairlamb. Robert was born 31 July 1770 and married Mary Harry. He died October 10, 1841. 
• Frederick Fairlamb’s homestead was in the southern part of Middletown township, and Frederick, with his family, attended the Chester Meeting of Friends. 
• Frederick’s son Joseph resided on a farm adjoining his father’s homestead and his son William lived by as well.

I am guessing at this point that Robert Fairlamb simply purchased John’s property. The letters of administration were granted two years after John’s death, and maybe the property was sold to pay for taxes or something? The big questions are:

Where was the rest of John's family at this point? Was John's wife Sarah still alive? Where were their children? Who are their children? :)

Where do I find the actual administration papers? Still looking for these answers.