Hardwick eventually was expanded to include seven principal bedrooms, nine bachelors rooms and secondary bedrooms, twelve servants' bedrooms and three bathrooms. With its bibliophile owners, the home had several libraries. (Most of the library collection, the 'Cullum Collection', was later donated to the Bury St Edmunds Record Office, where it remains.) Hardwick House also had an extensive collection of portraits, one of which was of Sir Thomas Gargrave, a once-powerful Yorkshire knight related to Sir Thomas Gery Cullum's wife's family. The Cullum family portraits were bequeathed to the Borough of St Edmundsbury in 1921 by the last surviving member of the Cullum family.
