"Knut E. Flaa" is most likely to be the Knud Eriksen of the Flaae farm in Rennebu district of Sør-Trøndelag, Norway as seen in the 1865 Norwegian census.
http://www.rhd.uit.no/folketellinger/ftliste_e.aspx?ft=1865&...He sailed from the port of Trondheim, Norway on or about 2 June 1870 stating his destination was "Reeds Landing".
http://digitalarkivet.uib.no/cgi-win/webcens.exe?slag=visbas...