I have some information on N P Zacho Davidsen, and am lookikng for more.
I have an Axel Frederik Davidsen, b. Cphgn DK Aug 6, 1884. Married to Dusine Lassen (Visby, 1886) in Aug 22, 1912. they had four children: Gladys, Florence, Elizabeth and Patricia. I once met Gladys. I have more on the Zacho Davidsens, if still interested.
(N. P. Zacho Davidsen is my great grandfather)