How big the first collections were is unknown but the 1831 figure of 300 insects given when the Belfast Natural History and Philosophical Society Museum opened to non-members may refer to specimens on display.
The Society still exists today retaining ownership of the Old Museum Building, publishing occasional books, and running a lecture series out of the Linen Hall Library.
Musei Belfastiani Fundamenta Prima PraesentibusSocietatis Historiae Naturalis apud BelfastamSociis, aliisque multis scientiae faventibusqui ad hoc opus pecuniam contulerant:Locavit Vir Honoratissimus Georgius Augustus Chichester Marchio de Donegall IV.
This covered birds, tortoises etc., lizards and serpents, fish, shells, corals, seafans etc., crabs, lobsters etc., asterias or starfish, insects, botanical specimens, seeds, minerals and Fossil.
Although the focus of the collections was primarily on zoology, botany and geology substantial archaeological, ethnographic and antiquarian acquisitions were made and in 1835 the Society gained an Egyptian mummy, Takabuti.
An increasingly literate population seeking knowledge and education in both the arts and the sciences drove the expansion of print culture and the dissemination of scientific learning.
Books owned by the Belfast Natural History Society reflect such changes, although some of the more expensive works were the gift of Thomas Fortescue and Arthur Hill.