He returned to St. Louis in 1837. That year, his half-brother Tom Tobin, then 14 years old, left with Charles and his colleague Ceran St. Vrain to return to Taos.
In 1837, the subject returned to St. Louis.  His half-brother, Tom Tobin, who was 14 at the time, traveled back to Taos with Charles and their colleague, Ceran St. Vrain.