- 1The Society of Telegraph Engineers : Established 1871. Rules and Regulations.
Westminster: Nichols and Sons 1878; 15 S.
Telegraphie; Großbritannien; Techniker; Verein / Satzung - 2Siemens Brothers & Co. <London>
Instructions for the use of Siemens Brothers` direct working ink-recording instruments (Siemens`Patent)
London: Nichols and Sons 1873; 27 S., 5 Karten
Telegraph; Gebrauchsanweisung