Analysis of information sources in references of the Wikipedia article "Battle of Achnashellach" in English language version.
Mackenzie's 1898 book contains a transcript of the 17th century birth brief from Alexander Munro, cadet of the Munro of Obsdale family, to Charles I of England
Quoting: Reg. of Privy Seal, II. fo. 108
Quoting: Gregory, Donald. (1881). History of the Western Highlands and Isles of Scotland. p. 97 and the Lochiel Memoirs