The information on registered seafarers is not in all cases complete. As new sources are studied, information on engagements and medals etc. will be added to some of the already registered seafarers.
NorwaySjøforklaring William Blumer
https://www.digitalarkivet.no/census/person/pf01073858005936
SAK/2031-0012/F/Fb/L0003, Arendal mønstringskrets