"I herewith send you a print of the _Andrachne_, which flowered, for the first time I presume in Europe, in Dr Fothergill's garden in May last year. It was raised from seed from Aleppo, sent to him by Dr Russell in the year 1756. Yon see its manner of flowering is very different from the arbutus. I have a large tree raised from the same seed, that stands abroad in the garden, but never blossomed. It is now beginning to shed its bark, as Belon or Belonius well describes; which is a peculiar difference from the _Arbutus_, and nearly agrees with the _Platanus_. "I am, my dear friend, with my sincere wishes for your health and preservation, your affectionate friend, "P. COLLINSON, "Now entered into my 73d year, in perfect health and strength in body and mind. God Almighty be praised and adored for the multitude of his mercies!--March 16th, 1767." A great part of the correspondence which Collinson had with Linnaeus bore a reference to the alleged hibernation of swallows, which the latter, following the authority of certain writers, supposed to retire on the approach of winter to the bottom of lakes and rivers, among reeds and other aquatic plants, where they remain in a torpid state till the beginning of summer. This preposterous idea the Englishman labours to convince his friend ought either to be given up, or established by accurate observation; but, if the great botanist was not too proud to renounce an error, he at least manifested no desire to satisfy his correspondent, nor does it appear that he ever afterwards alluded to the subject in any of his letters. The other individuals with whom he carried on an epistolary intercourse in England were, Dr Solander, his pupil; Mr Ellis, the first who proved the animal nature of corals and corallines; Mr George Edwards, librarian of the Royal College of Physicians, who produced a work on birds; Mr Pennant, the celebrated author of the British Zoology and other treatises; Mr Catesby, who wrote the Natural History of Carolina; Dr Mitchell, and a few more. Of these Mr Ellis appears to have been his most assiduous correspondent. MR ELLIS TO LINNAEUS. "London, December 5, 1766.