Die Brachiopoden der Hilsbildung im norwestlichen Deutschland.
1864. Zeitschrift der Deutschen geologischen Gesellschaft XVI-2; pp. 542-572, 4 plts. h.t. Orig. extract, plain new wrps. last plate with some brown spots, otherwise very good.
A monograph of the British Devonian Brachiopoda. Part VI, First and Scecond portion.
1864-1865. Palaeontographical Society, London. 131 pp. 20 plts. plus descript. pages h.t. Modern cloth, gilt on spine, contents very good, plates excellent, 4to.