For the period 1924-1928, the annual reports are bound and headed 'Animal Breeding Research Department', as the organisation was known before it was renamed the Institute of Animal Genetics in 1930. The later reports are unbound photocopies and also contain some items of correspondence.

The reports 1924-1928 are stamped 'Cossar Ewart Bequest' and the year 1934. There are reports wanting for the period 1930 and 1934.