Nyorera kupfuurira kweiyi ndima - Nicollet akasangana nematambudziko emari nehunyanzvi anokonzerwa nekusagadzikana kwezvematongerwo enyika muFrance zvichitevera Shanduko yaJuly (1830)
uye kudzora kuri kukura kwefizikisi sesayenzi yebasa. Asina mari, akatamira kuUnited States muna 1832, achibva pachiteshi chengarava cheBrest. Nicollet aitarisira kusimudzira mukurumbira wake pakati pevadzidzi veEurope kuburikidza nebasa rake muUS. Aida kuita "rwendo rwesayenzi" rwenyika yacho uye aiva nechinangwa chokushandisa ruzivo rwake kuti anyatsoongorora mepu yeMupata weRwizi rweMississippi. Akasvika muWashington, D.C., uko akasangana nemasayendisiti nevakuru vakuru vehurumende, vachikurukura nezvokuongorora kwenyika kwaiitwa nesayenzi. Akaenda kuNew Orleans, kwaaida kubva achienda kuSt. Louis, Missouri, asi nemhaka yokubuda kwecholera, kufamba nengarava yaimhanya nemhepo kwakanga kwaderedzwa. Panzvimbo pezvo akapedza makore matatu akatevera achifamba kumaodzanyemba, zvikurukuru pakati peNew Orleans neBaltimore. Nicollet pakupedzisira akasvika muSt. Louis muna 1835.