Imperial Army Series manual of Signalling, published in 1915, based on the official Training Manual - Signalling 1914, written by "an Officer of the Regular Army" and edited by Captain E. John Solano, complete with all pull-outs and illustrations.  Sixth reprint of the Third Edition, July, 1915.  Condition is used, with a split to the spine in one place, and an ownership inscription in ink on the inside front cover, but the binding is tight.