Drawings, section of grey substance of human by J [Jacob Augustus] L [Lockhart] Clarke Plate 21, figures 10-11 showing sections of the grey substance in the spinal cord of a human, near the middle of the cervical enlargement. Inscribed recto and verso with publication and plate details. Signed in graphite bottom left 'J. L. Clarke'. 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]