Lucknow University Library at my suggestion. I am indebted to the authorities of the (West) Panjab University Library, Lahore, who were kind enough to supply the photostat of Ms. B and to the authorities of the Lucknow University Library, Lucknow, for their cooperation in procuring transcripts of manuscripts for my use from time to time.
I remember with respect and gratitude my teacher, late Dr. A. N. Singh, formerly Professor and Head of the Department of Mathematics and Astronomy, Lucknow University, Lucknow, for his guidance, help and blessings and for placing at my disposal all manuscripts, transcripts and books of his collection.
I am also thankful to the many scholars whose works were consulted and found helpful during the preparation of this work.
Lastly, I express my thanks to the proprietor and staff of the industrial Printing Works, Raniganj, Lucknow, for the excellent composing, printing and get-up of the book.
K. S. Shukla
