Glad it helps!
Do you have the 1900 census for your Carl? It will state Carl's month-year of birth and thus could help tie him to the Carl found in Denmark.
Presumably you can order Carl's death record from the borough where he died (died 1960 in Seward, Alaska - is that right?). It should tell his day-month-year of birth and parents' names. The online transcription of a death record does not contain all the information that is on the original.
With those two records you would probably have proof that your Carl is the same as the Carl found by Paul in Denmark (or not, but I think so).
The 1910 census for John Henry and sisters came from Ancestry.com, but probably it is also available on Family Search. Ancestry.com is likely available at your library if you don't subscribe (you probably know that).
The Woody Island Baptist Orphanage has a lot of history online. In the Alaska forum you'll find others who are descended from children who lived there for a time.http://www.kodiakbaptistmission.org/woody/historicwoody.html