203 x 126 mm A fine SIGNED autograph from Ronald Ross, dated 3rd September 1930, written in black ink on headed ivory paper - The Ross Institute and Hospital for Tropical Diseases Putney Heath London SW15 Patron: HRH The Prince of Wales KG Telephone: Matron: Putney 3081 Secretary: Putney 4039 House: Putney 6632 - with two horizontal creases, light scrape to top left hand corner verso. In full: �Ronald Ross 3.9.30.� Ronald Ross (1857�1932) was a British doctor and scientist who discovered that malaria is transmitted by mosquitoes, revolutionising tropical medicine. Working mainly in India, he identified the malaria parasite in mosquitoes in 1897. For this breakthrough, he received the Nobel Prize in Physiology or Medicine in 1902. Ross later worked in public health, helping develop malaria prevention strategies and shaping modern understanding of infectious disease transmission.