Norwegian Volunteers at Battle of Dybbol Denmark

I haven't posted here for a long time but my Gt Gt Grandfather Samuel Nikolai Leth, ships carpenter, lived at kittlebuksvein 7 Arendal born 1824 died april 1864. I cant find a cause of his death. I'm looking at all options and recently discovered that Norwegian Volunteers fought at the Battle of Dybbol Denmark in the second Schleswig War. This was in April 1864 the same month Samuel died. Samuels ancestors were Danish and his Aunt (Catherine 'Kitty' Kallevig) was married to Morten Kallevig, son of the Danish Consul in Arendal who built the old Arendal Town Hall as their family home so Samuel had stong danish connections. Is there a list of names of the Norwegians who fought and died at Dybbol. I'm also researching in danish records