 Chambers notes that Harriet was probably 169 years old in 2004, although media outlets claimed the greater age of 175 at death based on a less reliable timeline.Charles Darwin visited the Galápagos for five weeks on the second voyage of HMS "Beagle" in 1835 and saw Galápagos tortoises on San Cristobal (Chatham) and Santiago (James) Islands.They appeared several times in his writings and journals, and played a role in the development of the theory of evolution.