Drawings, lumbar and cervical enlargements of the tortoise by J [Jacob Augustus] L [Lockhart] Clarke Plate 25, figures 44-45 showing transverse sections through the grey substance in the lumbar and cervical enlargements of the spinal cord of the tortoise. Inscribed recto and verso with publication and plate details. A large and partially cut off graphite inscription verso reads 'Urll[?] on the Shall we all go[...]'. Signed in graphite bottom left 'J. L. Clarke' and bottom right 'Drawn from Nat by Author 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]