This collection contains negatives and photographs taken by Captain Hewitt over four decades which cover a range of subjects including early pre-WWI aviation, birdwatching trips in the 1920s, car and motorcycle racing in the 1930s, the construction of the bird reserve at Bryn Aber and many family shots of the Captain and the Parrys. Later photographs come from the collection of Jack Parry and show the house and gardens in the 1960s.
There is also a selection of correspondence dating from the late 1950s and early 1960s between Captain Hewitt (by now mostly resident in the Bahamas) and Jack Parry, who acted as his representative at Bryn Aber. This is supplemented by much of Jack Parry's own correspondence about such local issues as the siting of a car park at Cemlyn and the proposed nuclear power station at Wylfa.