Walter Cooper Dendy

The philosophy of mystery

Harper & Brothers, New York 1845 (I ed. 1841).

Annuncio di Hersch Danemark

La Gazzetta Piemontese, N. 228, Torino 25 septiembre 1847.

Henry Christmas

The cradle of the twin giants, science and history

Vol. 1, Richard Bentley, London 1849.

Henry Christmas

The cradle of the twin giants, science and history

Vol. 2, Richard Bentley, London 1849.