Unpublished letter, regarding Wildbore's paper from Cha [Charles] Wildbore to Sir Joseph Banks Wildbore introduces his 'altered and enlarged' paper on spherical motion, improving on his original manuscript found at AP/7/16 following comments from Nevil Maskelyne. He explains that he has gone into greater depth about why his conclusions differ from those of [John] Landen on the subject. Subject: Physics / Mathematics Written by Wildbore in Broughton [Upper Broughton, Nottinghamshire, England] and addressed to Banks at Soho Square [London]. 24 April 1789