• “Herbaceous Rock Garden Plants: Some introductions from the Himalaya and S.W. China” Lecture given March 1921, 1950 by W.G. MacKenzie, reprinted from the Journal of the Royal Horticultural Society, v.75 pt.6, June 1950.
• RBGE Guidebook, 1934
• Plant catalogues:
o Hardy Plants Worth Growing; catalogue – V.N. Gauntlett & Co., Ltd., Japanese Nurseries, Chiddingfold, Surrey, No.90, c.1910 [image from RBGE on p.190]
o Trees and Shrubs catalogue – John Waterer, Sons & Crisp Ltd, Twyford, Berks – Autumn 1927- Spring 1928
o Ornamental Shrubs, Conifers and Climbers; catalogue – William Watson & Sons, Ltd., Killiney Nurseries, Co. Dublin – 1928-1929
o Choice Plants for the Rock Garden – Laird and Dickson, Pinkhill Nurseries, Edinburgh, c.1933
o Well’s Hardy Plants Catalogue – Wells Jun., The Nurseries, Merstham, Surrey – 1935-1936
o Trees and Shrubs catalogue – R.V. Roger, Pickering, Yorkshire – 1938-1939
o Hardy Heathers catalogue – Maxwell & Beale Ltd, Broadstone, Dorset – 1952-1953
• Sutton’s Seeds from Reading, England tin (lid cracked at back right corner – caution)