Well, if we assume this is them, and they were actually both born in Øystre Slidre, we`d have to check out the churchregisters for the Slidre area.

The records at LDS (Familyserach.com) go from 1848-1873, and I found seven children in that period:

1. Astrid PEDERSDATTER - Vital Records Index
Gender: F Birth/Christening: 22 Jan 1857 Ostre Slidre, Oppland, Norway

2. Tosten PEDERSEN - Vital Records Index
Gender: M Birth/Christening: 29 May 1858 Ostre Slidre, Oppland, Norway

3. Marit PEDERSDATTER - Vital Records Index
Gender: F Birth/Christening: 18 Sep 1859 Ostre Slidre, Oppland, Norway

4. Ingeborg PEDERSDATTER - Vital Records Index
Gender: F Birth/Christening: 08 Sep 1863 Ostre Slidre, Oppland, Norway

5. Kari PEDERSDATTER - Vital Records Index
Gender: F Birth/Christening: 11 Aug 1866 Ostre Slidre, Oppland, Norway

6. Knud PEDERSEN - Vital Records Index
Gender: M Birth/Christening: 16 Jan 1869 Ostre Slidre, Oppland, Norway

7. Gulbrand PEDERSEN - Vital Records Index
Gender: M Birth/Christening: 01 May 1873 Ostre Slidre, Oppland, Norway

Still no Albert... Hmmm. Does any of the above male birthdates match his (when was he born)? Maybe he took the name Albert in the States - or maybe this is a wild goose chase?!