This laboratory notebook begins with records for poultry breeding lines W 60-86 (birds which hatched between June and July 1902) [pp. 1-29], followed [on page 30r] by lists of matings and of old hens, cockerels and pullets kept. Pages 44-58 are blank.

From [page 59] entries continue with records for various birds including Malay bantam and Andalusian chickens, black red game-fowl, white and buff Leghorns, and Egyptian hens (including breeding lines C 160-163), dated April 1904 to July 1902.

The records for each bird include notes on colour, comb, and other physical characteristics, and (in some instances) state of health, and cause of death, etc. There are sketches of heads of birds on [pp. 63v, 73v and 75v].