to fix a limit of date on either side, and that limit has usually enabled me to complete the lists with confidence In some few cases I knew the date of issue of the sheet in which [ had found the " error," and in such cases there was no difficulty at all.
I have to express my obligations to the Director General of the Post Office of India, for allowing me to make use of official documents for the purpose of this hand-book. My thanks are also due to Babu Narain Kissen Sen of the office of the Superintendent of Stamps and Stationery, Calcutta, for the trouble taken by him in - checking and correcting the lists of various printings published in the Journal. Several members of the Society also have assisted me in various ways, and to them I am deeply grateful.
The illustrations speak for themselves and for the excellence of the work done in the photographic branch of the office of the Survey of India under the superintendence of Mr. Pope, to whom we owe the plates,
I trust that the second and concluding portion of the handbook will be ready for issue early in 1898.
Calcutta. December , 1897. C. Stewart- Wilson.
