Mirza Ghulam Ahmad was the classic punjabi fraudster. He had promised the Muslims of the Indian sub-continent 50 volumes/300 arguments in favor of Islam in roughly 1878. However, he only delivered one argument, and that argument was his claim of prophethood, which immediately got him declared as a Kafir by the ulema in India.
A summary of the quotation of Seeratul Mahdi- Number 123
It says that 300 arguments were Written on 2500 pages but in fact Only One Incomplete argument could be printed in Braheenay Ahmadia in total of 4 volumes . He says he heard that earlier writings were burned.