The C.W. Daniel Company Series The People's Classics unknow how many books in the Series

I came across these Booklets and man oh man trying to find them on the web is Hard, It was stated that The publisher, C W Daniel in 1902
He’s the pacifist publisher who went to jail rather than pay a fine when the anti-war pamphlet he wrote was published.
In 1902 Charles Daniel started his own small publishing business in Cursitor Street (off Chancery Lane, between Fleet Street and Holborn). He became associated with the Free Age Press, which had the agency for Tolstoy’s writings, and distributed them at such low prices that they could not have made a profit.
The firm also issued a series of ‘People’s Classics’ (at 1d or 2d a copy) ‘printed to place in the hands of the masses, at the cheapest price, the richest thoughts of the world’s greatest thinkers’. The series included writings by Emerson, Aristotle, Socrates, Rousseau and others. Anyone with any information on any of these booklets please share. Thanks in advance.