I am not researching this line, but did run across some information on him at the Nebraska Historical Society when I was researching a different line. According to Andreas History, he came from Holt Co, MO. Several books made mention that he was a slave owner, and this was an area that was strongly anti slavery, and was part of the underground railroad. This might have accounted for the fact he only lived there a short time. Andreas'History says, 'After a residence of several years, Mr. Brown removed to Texas. The people of that State were prejudiced against the name of Brown, probably thinking of "Ossawattomie," and, although an ardent believer in the institution of slavery, the founder of Brownville was compelled to seek another home, and he removed to Humboldt County, Cal." You might consider writing to the Ne State Historical society. For a fee, they will photocopy info for you.