Exkursion zu den heißen Quellen von <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009906 https://www.geonames.org/4013117">San José de Comanjillas</placeName>. Weitere Reiseroute: Übergang über den Río Grande, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0010088 https://www.geonames.org/3980605">Valle de Santiago</placeName> (11.9.), <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008988 https://www.geonames.org/3995402">Valladolid</placeName> (14./15.9.), Besteigung des <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0006599 https://www.geonames.org/9516364">Jorullo</placeName> (19.9.). Rückreise: <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008164 https://www.geonames.org/3993179">Pátzcuaro</placeName> (21.9.), Valladolid (23./24.9.), <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0002307 https://www.geonames.org/4019827">Acámbaro</placeName>, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0008692 https://www.geonames.org/3996626">Maravatío</placeName>, <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0006758 https://www.geonames.org/3526670">Ixtlahuaca</placeName>, Stadt und Vulkan <placeName xmlns="http://www.tei-c.org/ns/1.0" ref="https://edition-humboldt.de/H0009458 https://www.geonames.org/3515302">Toluca</placeName> (Vulkan Toluca: 28.–29.9.).