Which Reminds Me

There is a question of when my great-grandparents were in China. They were commissioned as Christian workers in 1910 but when did they actually go to China? What was the travel timeline? The death of their infant son Philip Barth is recorded as 1911 and his grave's location in Los Angeles seems to suggest that they did not actually travel to China until later. Was the recorded departure of 1914 their first voyage to China? So these are some questions whose answers were not clear.