"We traveled this forenoon over the roughest and most desolate piece of ground that was ever made," wrote Amelia Knight during her 1853 wagon train journey to Oregon. Some of the parties who traveled with Knight were propelled by religious motives. Hannah King, an Englishwoman and Mormon convert, was headed for Salt Lake City. Her cultured, introspective diary touches on the feelings of sensitive people bound together in a stressful undertaking. Celinda...