Statistics for occurrence #1 of “Colonel R. B. Mason” in chapter 19 of William Boynton, Sherman's Historical Raid:

.... The next month (April) he was assigned as aid-de-camp to General Kearney. In May General Kearney left California, and Lieutenant Sherman became acting assistant adjutant-general on the staff of Colonel R. B. Mason . In February, 1849, he was relieved from this service and assigned in the same capacity to the staff of General Persifer F. Smith. While thus acting his duties were changed to those of aid-de-cam...
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