A short time before my leaving Calcutta, a Maulavi, by name Gholaum Hosain, was introduced to me under the character of a great mathematician and astronomer. I found he was in the service of Mirza Khán Bahádur, the Mohammedan son of Mitrajít Singh, the well-known Mahá Rájá, of Takari, in Bahar. The Maulavi stated, that he had devoted himself to the study of mathematics and astronomy, not only as far as they are contained in the Arabian and Brahminical writings, but also as far as he could gain from the interpretation of European books, as given him by European friends, he himself being ignorant of English; that he had, under the patronage of Khán Bahádur, compiled a system of these sciences from all these sources, and that his patron had supplied him with a sum of money to publish this book at one of the lithographic presses of Calcutta. This was the purport of his present errand down the country, and he had already got about 100 pages carried through the press. His object in applying to me was to obtain a recommendation of his work to the Government Education Committee. He produced his MS., but it was much too long to examine minutely in the short time I had to remain in Calcutta, and in my then harassed state of mind and body. I saw enough, however, to convince me that it was a work of very considerable merit and information, compared with the author's opportunities. It commenced with the elements of geometry and arithmetic as known to the Hindús, and thence went on.In the course of the work are explained, the European methods of decimal fractions, logarithms, and trigonometrical tables. The author then gives a system of astronomy, first according to the Brahmins, then according to Ptolemy, and then according to Copernicus, together with an account of astronomical instruments, and the mode of calculating astronomical tables and almanacs. The whole MS., as will appear from the author's own computation, comprehends 900 closely-written quarto pages.