The series comprises research notes, pedigrees, press cuttings, manuscript and printed sources, copies and extracts from literature, private letters, printed leaflets and circulars, on the subjects of canine bibliographies, 1958, 1972, literature, [post-1786], 1896, [1925], 1944-1945, history, c. 1800, 1862-1875, 1908-1951, British and foreign dog breeds, classification of types, breed conformation standards, 1883-1995, physiology and health, 1924-1970, care, breeding and training, [post-1924]-1971, hunting, 1888-1954, dogs in art, war, work and leisure, 1937-1951, and the pug, 1950-1966; and an album of show certificates, [1889]-1895. Since the format of the majority of files is similar, only items of particular interest are noted at file level.

The series comprises whole issues, individual pages, scrap books and loose cuttings of newspapers and magazines, 1816-1993, covering the biology of breeding, breed types, care, welfare, training, dog-loving celebrities, showing, clubs, animal photography, dogs and the law, working dogs, terriers, spaniels, anecdotes and a few, non-canine topics.

A notebook largely containing copies of popular nineteenth century poetry (e.g. 'Yr Eneth a Ga'dd ei Gwrthod', 'Hen ffon fy nain', 'Relwe Cerrigydruidion', etc.). Also included in the volume is a copy of a letter, 15 February, 1888, from John Hughes, Bellan, Mold, to 'Mr. Owen', requesting the repayment of a loan; notes on the breeding of the dog; etc.