August and Martinius Hansen to USA 1883-4

August Hansen, born 6/1/1855 on Tyndelsrud farm in Rødenes, Østfold, Norway, emigrated to USA in 1883 and his brother Martinius (born 6/3/1857) followed the year after. The family have reason to believe that August was still in USA in 1886, and Martinius in 1928. I don't have access to the USA censuses after 1880, so would appreciate any help or suggestions. They emigrated too early to be in the Ellis Island register, are there any immigration records for that period available per Internett?