Dear Judy
I am an archivist at the Salvation Army Archives in Copenhagen Denmark
I came across your query when I was researching what had happened to Conrad Valdemar Nielsen after 1892
I dont know about the royal connection at all .
But this is what we know from our archives : As a young man Conrad Valdemar Nielsen travelled to the USA He came in contact with the Salvation Army on the East coast and became an officer as well and worked in the Boston area When his father was dying he wanted to go back to Denmark With approval of the International Headquarters, London he travelled home for the funeral, but was also asked to help the Salvation Army begin its work in Denmark He was in fact the first Danish officer and worked alongside an Englishman who had started the work in Sweden before. He began the work in 2 Copenhagen congregations in the one Aalborg and Odense.
He was one of the pioneers of the work in Denmark !
He met Petra Jørgine through his work in Odense. They got married and had 2 children in Odense. I have their official wedding photo in the archives as published in the War Cry
The address in Vindegade in Odense has been used by Salvation Army officers until 1999 In 1892 I have found him again as adjudant working at Headquarters.
Apparently shortly after they travelled back to the USA I dont know if he continued to work for the Salvation Army there
I have found traces of Emanuel his son and know that he died in Connecticut in 1955
It would please me greatly if you could help me with any details about their further life in the USA