In August of 1852 the first missionaries were called to Asia. Four were called but only three made the journey. They arrived in Hong Kong on April 27, 1853. Hosea Stout kept a journal which has been published a few times.
You can read a typescript of his journals here: Diary of Hosea Stout
Another mentions in the Millennial Star can be read here: http://contentdm.lib.byu.edu/u?/MStar,17044 and here: http://contentdm.lib.byu.edu/cdm/ref/collection/MStar/id/6819
CHINA MISSION.- We have received a letter from Elder James Lewis, dated San Francisco February 14, who, with Elders Hosea Stout and Duncan Chapman, is on a mission to China. Elder Lewis states that, at the date of his letter, all the Elders for the other missions had sailed from San Francisco, and that himself and Elders Stout and Chapman were expecting to sail in a few days from there, for Hong Kong. It is our prayer that these brethren may be enabled to open the doors and windows of the “Celestial Empire,” that its inhabitants may be cheered with the celestial light that is now beaming from the heaven of heavens. It will afford us special pleasure to hear from time to time of the progress of the various missions which are now on foot amongst the nations.