Unpublished letter, regarding anatomical research from A [Anders] Retzius to William Sharpey Retzius writes to Sharpey regarding anatomical research into embryos and the growth of the cranium. Includes two anatomical figures. Subject: Anatomy / Embryology Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 7 of the Proceedings of the Royal Society as 'Anatomical notices. By Professor Andrew Retzius, of Stockholm. Extracted from a letter to Dr. Sharpey, dated 10th May, 1855. Communicated by Dr. Sharpey, Sec. R. S. (Translation.)'. 10 May 1855