Letters of the Lady Brilliana Harley, Wife of Sir Robert Harley, of Brampton Bryan, Knight of the Bath (London: Printed for the Camden Society, 1854), by Brilliana Harley, ed. by Thomas Taylor Lewis (stable link)
New Online Books
http://onlinebooks.library.upenn.edu/webbin/book//lookupid?key=olbp67275
Free ebooks and useful pdf