Susanna "Susie" Carson Rijnhart, (later Moyes, 1868 – 1908) was a Canadian medical doctor, Protestant missionary, and Tibetan explorer.

"[3] A charismatic speaker, he was lecturing in Canada and soliciting financial support to return to China and work in Tibet when he met Susie.

Independent missionaries were often criticized as loose cannons, more likely to cause trouble than to achieve progress in the goal of making China a Christian country.

[5] In mid-1895, the Rijnharts and their colleague, William Neil Ferguson, arrived at their destination of Lusar, a small village servicing the Kumbum, one of the largest and most important Tibetan Buddhist monasteries.

[6] Ferguson parted ways with the Rijnharts after a few months and their nearest Western neighbors were missionaries in Xining, seventeen miles away.

[9] The British traveler, Montagu Sinclair Wellby, passed through Tankar in October 1896 and gave a favorable view of the Rijnharts and their good relations with Chinese officials.

He described Susie as a “bareheaded young lady wearing spectacles and dressed after the Chinese manner…Through her medical knowledge and skill, Mrs. Rheinhard [sic] had won several friends among the native population.”[11] Shortly after Petreus returned, the couple had a son, Charles Carson, born June 30, 1897.

Their destination was Lhasa, eight hundred miles away as the crow flies but across a series of mountain ranges through passes at elevations of up to 5,000 metres (16,000 ft).

Following a known caravan route to Lhasa, they skirted the Tsaidam and proceeded southwest, roughly following the track a modern highway follows today.

Their reliable Muslim guide departed at this time, with their permission, to journey to his home in Ladakh and they were left alone at the mercy of the Tibetans.

On September 6, in a snow storm, with three guides provided by the Tibetan government, the Rijnharts departed Nagchu on the "tea road" east.

She asked the way to the house of the China Inland Mission and there she introduced herself to missionaries Edward Amundsen and James Moyes, who would later become her second husband.

She wrote a book about her experiences and lectured, and in 1902 returned to China, this time to Kangding (Tachienlu), a city on the Sichuan-Tibetan border, with the Foreign Christian Missionary Society.

[16][17] Dr. Susie Rijnhart typified the independent and adventurous women, often missionaries, who were beginning to travel the world and practice a variety of professions.