The county figures for Wilkins only add up to 1,432.
The House Journal is missing the votes from Clatsop County. Those figures were found in the 6/28/1878 States Rights Democrat (of Albany). https://chroniclingamerica.loc.gov/lccn/sn84022644/1878-06-28/ed-1/seq-2/
Source for Popular Vote data: Oregon Legislative Assembly. Journal of the House of the Legislative Assembly of the State of Oregon, Oregon Legislative Assembly (https://babel.hathitrust.org/cgi/pt?id=uc1.b2946292&view=1up&seq=26) (accessed 15 Sep 2023)