Tip for searching naturalization records

For a couple of weeks I had been unable to find the naturalization record for one of my Norwegian ancestors who immigrated to the United States in 1879. (For those following the other thread I'm referring to Iver F. Iverson.) Today I discovered why. On the handwritten naturalization record, the place of birth is listed as "King of Sweden and Norway." When this got input to the digital version, such as Ancestry.com, the place of origin shows up as Sweden. Therefore, if you select "Norway" for your search term, you will miss the record. I have found the naturalization records for Iver Frithjof. It occurred in 1890 in New York. Would this make sense if he arrived in 1879 and was living in Chicago? Here Here2 Some of you also noticed that I had included a picture of Iver when he was older and the picture was taken in New York. One picture I did not include in my file was from the same photographer in the same location. It was a picture of a young boy. It would make sense if this was Iver's son Arthur, born 1883, and the family traveled to New York for the naturalization in 1890. Here is one more interesting finding. There is an Iver Frithjuf Iverson in a WWII military ship record from 1942. This could not be my Iver because he was born in 1857 and would have been 85 years old. I wonder who this Iver F. Iverson is, though? Here3 *** UPDATE: Found an Iver Frithjuf Iverson born 1920, died in Oregon. *** Good night!