"Letters received by Pybus regarding various topics including Pybus writing an article in the Medical Gazette about rare book collecting, several letters highlighting items that may interest Pybus, Pybus approaches several institutions and collectors about specific items and one of these letters reflects his first interests and start-up of his collection – there are responses to adverts he places trying to find certain volumes. Pybus has several discussions about “Harvey” and Pybus’ collection of his items, including an offer of sale for(Exercitationes duae anatomicae de circulatione sanguinis William Harvey 1578-1657. 1649 - http://www.ncl.ac.uk/library/linkit?sv=o&s=sn&q=NCL_LMS000302464] . One letter asks Pybus about his intent to bid on a particular item so the sender doesn’t also bid on it. Some letters do not relate entirely to this theme, two regarding Pybus loaning books to the Medical School (King’s College, Durham University) for an exhibition and also to the British Medical Association for an exhibition. A letter from the Royal College of Surgeons asks about whom to approach for donations towards “Lives of the Fellows of the Royal College of Surgeons”. "