The Third International Congress on Vegetarian Nutrition providedan occasion to recognize 2 individuals who helped to initiatethe scientific investigation of vegetarian dietary practices,to validate their nutritional adequacy, and to disseminate bothscientific and practical information about vegetarian diets.We acknowledge with gratitude their accomplishments and contributionsto the field of vegetarian nutrition. These proceedings arein recognition of the work of Mervyn G Hardinge and are dedicatedto the memory of UD Register.