of the Siddhānta Shiromani, aiding its publication by the authors Lancelot Wilkinson and Pandit Bapu Deva Sastri in 1863. In response to a question from Professor Edward Byles Cowell on how H.T. Colebrooke came up with an age for the Vedas, he worked out calculations based on astronomical references, finding some errors in Colebrooke and came up with the suggestion that it could be from either around 1181 or 1229 BC. Pratt however felt that both Indian and Arab astronomy had failed to build a mathematical or physical framework and that their only major achievement was limited to the prediction of eclipses and even these, he considered as imprecise. In 1849, Pratt and his brother wrote a memoir on their father. In 1856, Pratt published a book entitled Scripture and Science not at Variance, which went through numerous editions; it was first written to counter a statement by the mathematician Baden Powell (father of the scouting pioneer) that "all geology is contrary to Scripture", and then went on to counter other scientific theories including that of Evolution that were thought to conflict with the Bible. In 1865 he edited his father's manuscript Eclectic Notes, or Notes of Discussion on Religious Topics at the Meetings of the Eclectic Society, London, during the years 1798–1814. He also published a Paraphrase of the revelation of Saint John (1862). A Pratt School for Girls was founded in his memory in Calcutta in 1876 by Bishop Milman. This school is located on A.J.C. Bose Road, Kolkata, and is now known as the Pratt Memorial School. References External links 19th-century English mathematicians 1809 births 1871 deaths People educated at Oakham School Fellows of the Royal Society 19th-century English writers 19th-century English Anglican priests Alumni of Gonville and Caius College, Cambridge British East India Company people Archdeacons of Calcutta