Library: Holds almost 11,000 volumes including rare and valuable books and 117 journal titles. The Library is also in possession of extremely rare collections of manuscripts of national interest belonging to the 17th and 18th centuries collected over two centuries. The Library is primarily for the use of the members of the Society. Other readers may be admitted, by prior appointment, for a limited period of time. Facilities are available for photocopying and scanning at prescribed rates. However materials over 50 years old cannot be photocopied.