Su-Lin, 9 weeks old at the time of his capture, was named after Su-Lin Young, the sister-in-law of Harkness's expedition partner Quentin Young. (Harkness and Young were unaware that the baby panda was, in fact, a male.)
Harkness returned to America with the bottle-fed cub, and Su-Lin became the first live panda to come to the United States. He eventually found a home at the Brookfield Zoo in Chicago. Su Lin died only about a year and a half after Harkness brought back her second panda Mei-Mei. This was revealed in her book the Lady and the panda.