Robert Etheridge, Quarterly Journal of the Geological Society of London (1877)
“ By R. Etheridge, Esq., F.R.S., G.G.S. Admiral Spratt's collection consists entirely of plants, the whole of them of undoubted Coal-measure age. The genera and many of the species are precisely those of the Coal-measures of Britain. ”
Robert Etheridge, Quarterly Journal of the Geological Society of London (1877)
“ Mr. Etheridge stated that the fossils and rocks were undoubtedly truly of Carboniferous age, and from our ordinary experience would be regarded as rather low down in the series. He noticed the species of plants which occurred among Admiral Spratt's specimens, and dwelt especially on the presence of Stigmaria ficoïdes. ”
