Authored by pioneer missionary Narcissa Prentiss Whitman, The Letters of Narcissa Whitman compiles her poignant, firsthand correspondence sent to family and friends in New York while living among the Cayuse people at the Waiilatpu Mission in southeastern Washington from 1836 until her tragic death in 1847. The letters document the staggering physical isolation, cultural clashes, and domestic struggles of being among the first white American women to cross the Rocky Mountains and settle in the Pacific Northwest. Through her eloquent and deeply personal accounts, the text offers an unvarnished window into the mindset of evangelical expansionism and the heavy psychological toll of frontier life. A keen insight drawn from the work is how domestic correspondence functioned as an ideological tether for women on the religious frontier; by meticulously chronicling her daily efforts to transplant Victorian domesticity into an Indigenous landscape, Whitman's letters reveal how female missionaries attempted to domesticate foreign geopolitical spaces through the sheer force of written narrative and cultural replication.