Miscellaneous collections made for or by Browne Willis for his Notitia Parliamentaria (1715-50) and for his proposed 'Catalogue of ... the Members of the several Parliaments', of which a printed prospectus is prefixed, dated 1747; roughly arranged in alphabetical order of counties. There are many letters addressed to him about the work, as: Fol. 8. four from Arthur Onslow the…