 Garrison akafamba zvikuru muUnited States yose, achishanyira nzvimbo dzinokosha kubva kuNew York kuenda kuCalifornia uye kuFlorida. Muna 1897, nzendo dzake dzakawedzerwa kuenda kuEurope, paakaperekedza nhume kuTwelfth International Medical congress yakaitirwa muMoscow kuburikidza neItaly, Switzerland, Germany, neAustria. Pakudzoka kwake mugore iroro, akapa hurukuro yaiva nomusoro unoti Vakadzi Vandakaonana Navo muRussia, pamberi pevadzidzi veSteinmann Institute. Muna June 1900, akaronga kuenda kuEurope kunoshanyira 1900 Paris Expositionuye kupupurira Oberammergau Passion Play muBavarian Alps. Akaita chiziviso muna 1920, kuti pashure pemakore makumi mana nemana ekurapa, aizova nyanzvi mukurapa goitre, asthma uye kutanga kwechirwere chepfuva. 