Unpublished figure, 'Showing the uncomformability of the "head" at the western end of the "coal pit"' by William Pengelly A figure in coloured ink, labelled figure 1, which shows strata in black, blue, brown and yellow. The figure is captioned 'The black bands are lignite; the orange, sand; all the others various coloured clays'. Subject: Mineralogy / Geology 1861