Drawings, 'Transverse sections of spinal chord [sic] of tortoise' by J [Jacob Augustus] L [Lockhart] Clarke Plate 22, figures 37-43 showing several transverse sections of the spinal cord of a tortoise, including sections through the cervical enlargement, dorsal region, and the lumbar enlargement. Inscribed recto and verso with publication and plate details. Signed in graphite in centre 'J. L. Clarke' and bottom right 'Drawn by author'. Embossed stamp in top left corner reads 'Bristol Board'. The manuscript for this paper is wanting. Subject: Anatomy Published in Philosophical Transactions as part of paper titled 'Further researches on the grey substance of the spinal cord' by Jacob Augustus Lockhart Clarke. Received and read by the Royal Society on 17 June 1858. [1858]