Sir Archibald was the author of the following works : 1. "A Commentary on the Mohammedan Law." 2. "Notes on the Siege of Delhi in 1804, with Observations on the position of the Indian Government under the Marquess of Wellesley," 8vo. 3. "On Sieges of India." This work is said to have been reprinted, on the recommendation of General Mudge, by the court of directors, and used at their military college, and to have been distributed to the army for general instruction by the orders of the Marquis of Hastings (ib. p. 661). 4. "Treatise on the Manufacture of Gunpowder." 5. 'Observations on the Law and Constitution and present Government of India,' &amp;c., second edition, with additions, London, 1832, 8vo.