The papers of John Romer consist of:

• An untitled translation beginning: "Translation of the first fifteen verses of Col. 1 of the Behistun inscription, being done into the literal and schismatic Persian rejecting Arabic works". Romer provides a description of his translation in English and a copy of the fifteen verses in Persian. He acknowledges the work that Sir Henry Rawlinson undertook on the inscriptions. Six sheets of paper, 20 sides. The final page bears the label in a different hand, "Persian Language, J. Romer Esq."
• A letter to the Bombay Gazette found within the 1687 Complementum thesauri linguarum Orientalum by Franciszek Meninski, (1623-1698). This Thesaurus was donated to the the Royal Asiatic Society by John Romer. The letter to the Gazette takes issue with a contemporary evaluation of the Dabistan, a seventeenth century work in Persian, which is a unique study of different religious creeds. The letter gives some explanation of the Dabistan and provides some examples. It is dated 20 July 1820, handwritten, 8 sides.

'Copy of a Letter addressed to Col. Sykes by the Revd. Dr. J. Stevenson on an Inscription from the Nana Ghat, Bombay (Mumbai), 14 May 1851' in which he writes that the Cave Com. of the Royal Asiatic Society has acquired the services of a young man, Mr Brett, who has a taste for the study of languages and makes very good sketches. He is engaged in making exact facsimiles of all the Western India Inscriptions. He also writes that his Society has agreed to reprint the three volumes of the Transactions of the Bombay Literary Society. In the third volume, he writes, is an inscription from the Nana Ghat which he had visited recently and so wants to add to what was already known.

'Extract from a Letter addressed to Col. Sykes by William A. Fallon Esq. dated Elephanta, 16 February 1852' in which he writes of sending into the Government a large painting of the altar piece at Elephanta on a canvas nearly 7 feet long and 2 feet 2 inches high. He also sent other plans and elevations drawn to scale. He writes that Lord Falkland is pleased with the painting.