Dr Hilda Canter-Lund was a scientist at the UK’s Freshwater Biological Association, based on the shores of Lake Windermere. As well as being a very accomplished scientist, she was an outstanding photographer – she was elected as a Fellow of the Royal Society Photographic Society. The images we have reproduced here come from her book Freshwater Algae – Their microscopic world explained written in conjunction with her husband – Dr John Lund – Fellow of the Royal Society. The book is still in print and, considering the quality and wealth of the images, good value for money. The images are still under copyright and this should be respected – accordingly I have watermarked the images. If you want to use them without the watermark – I have found the publisher (Biopress Ltd, Bristol, UK) very sympathetic to reasonable requests.