Rachel Saunders and her husband Rod Saunders were co-owners of Silverhill Seeds, a company specializing in South African seeds and also selling books. Throughout much of the year they traveled around South Africa collecting seeds. In addition Rachel was the treasurer of the Indigenous Bulb Association of South Africa and edited their annual Bulletin for a number of years. She provided a lot of helpful information to the PBS list for many years and also contributed photos to the wiki. For a number of years Rod and Rachel had been locating and photographing Gladiolus species, including elusive species not easily found in the wild, in order to write a book. Rachel supplied photographs to the PBS wiki of many of the species as they located them. Well loved, Rachel corresponded with many of Silverhill's customers from around the world, answering questions and providing guidance. While out collecting February 2018 in Northern KwaZulu-Natal, they were murdered by terrorists.
The spring 2018 issue of the PBS Bulb Garden was dedicated to their memory.