He was sworn in on December 14, 1857.
His district number wasn't listed in the House Journal. We're fairly certain that this is his district but it should be verified in an authoritative source.
An 1858-59 session was not held due to the protracted session of 1857-58. (Minnesota Legislative Manual, 1872, p. 66) Thus, even though the first session was adjourned on August 12, 1858; the term end date for it is listed as the day before the second legislative session's start date.