Captain James Stirling's journals offer a firsthand account of the 42nd Regiment's actions during the Peninsular War. For such a famous regiment as the 42nd Regiment of Foot (The Black Watch), the number of published memoirs is surprisingly low. The discovery of the three hand-written journals in the collection of the National Library of Scotland covering the period from August 1808, when the regiment left Gibraltar for Lisbon until the end of 1813, are therefore of significant importance in our understanding of the actions of this regiment during the Peninsular War. James Stirling became an Ensign by purchase in the 42nd Foot on 14 August 1805 at the age of thirteen, vice Ensign Thomas Munro. He then rose to the rank of Lieutenant without purchase on 27 August 1807. Stirling served in the Peninsula with 42nd Foot from September 1808 to January 1809, then at Walcheren and again in the Peninsula from May 1812 to August 1813 (from October 1812 as Aide de Camp to his father Major General James Stirling). On his father's retirement from active service, he joined the Portuguese Army from 9 November 1813 as a Brevet Captain in the 11th Line Regiment, remaining with them until 13 October 1814. He then became a Captain in the 42nd by purchase on 11 May 1815. He saw action at Walcheren, Corunna, Salamanca, Burgos, the Pyrenees, Orthez and Toulouse. He retired from the army in 1817 and died on 20 January 1818 aged only 25 years old. These absorbing and revealing journals cover Captain James Stirling's entire period of active service with the 42nd Foot, as well as the time he served with the Portuguese forces until the end of 1813, his sudden death preventing him from completing the record of his service with the Portuguese Army in 1814. Author Gareth Glover provides explanatory notes throughout to add extra context to Stirling's commentary, making this book accessible for both the historian and enthusiast.