I'm a member of the Royal Entomological Society and I'd like to visit the library. What types of materials can I access there, and what do I need to do to arrange my visit, including who to contact and what information I should provide?
Navigate directly to the Royal Entomological Society's Library and Archive page at https://www.royensoc.co.uk/library/. Scroll down the page to view all content related to library holdings and access. Identify the distinct categories of materials available to members. Locate information regarding how members can access these materials, specifically focusing on visit requirements and contact details. Synthesize the identified material categories and access information into a concise answer.
State that the available materials include 'Library holdings' (or 'Main Collection'/'Rare Books Collection'), 'Free access to RES journals', and 'Archive'. State that members and Fellows of the Society may visit the Library by appointment only. Provide the contact information (email: library@royensoc.co.uk or phone: 01727899387) for arranging an appointment.