Drawings, transverse section of grey substance of ox by J [Jacob Augustus] L [Lockhart] Clarke Plate 20, figures 2 and 4 and plate 21, figure 3 showing a transverse section of the grey substance in the spinal cord of an ox, from the dorsal region and from the lower part of the cervical enlargement. Inscribed recto and verso with publication and plate details. A graphite inscription below reads 'Transverse section thro' the dorsal region of ox unfinished'. Signed in graphite along bottom 'Drawn from nature by the 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]