The Rev. Leonard Jenyns was an important 19th century naturalist, who together with his brother-in-law J.S. Henslow, was offered the position of naturalist on HMS Beagle which he declined in favour of his friend Charles Darwin. All three made natural history observations in Cambridgeshire and collected local specimens.Jenyns included these observations in a hand-written manuscript he completed in 1869 entitled ‘Contributions towards a Fauna Cantabrigiensis’. The text of that manuscript is reprod..