Bark Brødrene & Kong Sverre descriptions?

Is there any more info available on these ships (description & picture) besides the basic info on this web site (year built, voyages, shipyard, ship line-J. A. Køhler, typical bark)? I have found my ggrandparents (came separetely prior to marriage) on the manifests, and would like to find more info on the ships. I checked the Shipslist.com but found nothing further. Thanks. Jon