Chichester Meeting starts in England in the 17th Century where William Clayton, one of the founders of the meeting in the colonies was a member of the Chichester Meeting in Sussex. By the way in England the name is pronounced with a short "i' as in "chit - chester". Follow the links below and search on the page for "William Clayton". http://www.chichesterquakers.org.uk/A_History_of_Chichester_Quakers.html

Detailed historical information can be found in The History of Delaware County by Henry Graham Ashmead found here: https://archive.org/details/cu31924006215655 (see page 450). George Smith's history of Delaware County also has some interesting facts: https://ia601408.us.archive.org/4/items/historyofdelaw00smit/historyofdelaw00smit.pdf (see page 136 for the Chichester name)

The Delaware County Planning Departmenthas a brief history of the township here: http://www.chichesterhistory.org/BRIEF-HISTORY-OF-UPPER-CHICHESTER.pdf

There are voluminous amounts of information on Quakers. Here are two good sources on early Friends: https://www.nytimes.com/books/first/w/walvin-quakers.html
http://www.phmc.state.pa.us/portal/communities/pa-heritage/our-first-friends-early-quakers.html

The National Historic Register process produced a report for the Historic American Buildings Survey (HABS) which has a detailed history of Chichester Meeting with an emphasis on the meetinghouse design and construction here:
http://lcweb2.loc.gov/master/pnp/habshaer/pa/pa3600/pa3602/data/pa3602data.pdf

Information on who is buried in the cemetery is here:
http://www.delawarecountyhistory.com/upperchichestertownship/UpperChiChesterFriendsCemetery.htm

Meetinghouse Wikipedia Page: https://en.wikipedia.org/wiki/Chichester_Friends_Meetinghouse