The collection is composed of various proofs forTransactions of the Royal Society of Edinburgh, Vol.LIX., pp.533-562. (c.1938). Various proofs prior to the final copy include:
- - Plate I - colour illustrations mounted on card - illustrations 1 to 12
- - Plate II - colour illustrations mounted on card - illustrations 13 to 24
- - Plate III - monochrome proof - illustrations 25-31 (cells structure)
- - Plate IV - colour illustrations mounted on card - illustrations 33 to 48
- - Plate V - monochrome photographs on card mount - illustrations 49a to 61b
- - Plate I - full-colour proof - illustrations 1 to 12 (several copies)
- - Plate II- full-colour proof - illustrations 13 to 24 (several copies)
- - Plate IV- full-colour proof - illustrations 33 to 48 (several copies)
- - Plate V - monochrome proof - illustrations 49a to 61b