The North Dakota Public Death Index has a death for a Christine GREGERSEN, born 03/26/1842, died 06/19/1932.

There is also an Elise SORENSON, born 07/01/1859.

Those are the closest match I can find; you may find more, using variations of spellings. It is easiest for search using last name only:

https://secure.apps.state.nd.us/doh/certificates/deathCertSe...