searching dates of death great-grandparents

I am searching for the dates of death for my great-grandfather, Hans Hansen Hjelseth( born 22.12.1841, in Molde), and great grandmother Ellemine Kristine Hjelseth (born 11.9.1860, Sogne). Last known residence, for both,1910 "Folketelling for Arendal". Can you help? Thank you.