Title page (Signalling, 1918).jpg
<a href="//commons.wikimedia.org/wiki/User:Andy_Dingley" title="User:Andy Dingley">Andy Dingley</a> (scanner)
1918
Scan from <cite class="book" style="font-style:normal">'an Officer of the Regular Army' (1918)   Capt. E.J. Solano , ed.   <i> Signalling</i>, <a href="https://en.wikipedia.org/wiki/en:London" class="extiw" title="w:en:London"><span title="capital and largest city of the United Kingdom">London</span></a>:  John Murray  <small></small></cite>