Dressed practically and riding not sidesaddle but frontwards like a man (though she threatened to sue the Times for saying she dressed like one), she covered over 800 miles in the Rocky Mountains in 1873. Her letters to her sister, first printed in the magazine Leisure Hour, comprised her fourth and perhaps most famous book, A Lady's Life in the Rocky Mountains. Bird's time in the Rockies was enlivened especially by her acquaintance with Jim Nugent, "Rocky Mountain Jim", a textbook outlaw with one eye and an affinity for violence and poetry. "A man any woman might love but no sane woman would marry," Bird declared in a section excised from her letters before their publication. Nugent also seemed captivated by the independent-minded Bird, but she ultimately left the Rockies and her "dear desperado." Nugent was shot dead less than a year later.Other notable books by Isabella Bird include Unbeaten Tracks in Japan, Journeys in Persia and Kurdistan, Among the Tibetans, and The Englishwoman in America.