Wetherill, Charles. History of The Religious Society of Friends Called by Some The Free Quakers, in the City of Philadelphia. Philadelphia: Printed for the Society, 1894, Number 3 of an edition limited to 800 copies, signed by Charles Wetherill.
This Document is on The Quaker Writings Home Page.
"By General Subscription, For the Free Quakers, erected, In the year of our Lord, 1753, Of the Empire 8."Nearly every building of the old City has, since this date, been torn down and replaced by edifices suited to the changing needs of commerce; but this house stands, the memorial of a past age, and is the only monument now left of the heroism of certain members of the Religious Society of Friends, in the stormy time of the Revolutionary War.