On May 23, Sr. selected a party to go with him on a private expedition. Captain John Brown, Jr., objected to their leaving his company, but seeing that his father was obdurate, acquiesced, telling him to "do nothing rash." The company consisted of John Brown, four of his sons—Frederick, Owen, Salmon, and Oliver—Thomas Weiner, and James Townsley (who claimed he was forced by Brown to participate in the incident), whom John had induced to carry the party in his wagon to their proposed field of operations.