Otto Frederik HAGEMANN born c.1832

My first posting to the list. Otto, I have been searching for 3 years and just found he may have a sister called Othilie/Ottilie TORGERSEN nee HAGEMANN whose parents are Otto HAGEMANN and Marie TORNBOM. The Latter Day Saints (Mormons) Pilot site provided the above details but no luck with Otto. His Will (died 27 May 1890) states him a Marine Surveyor from Norway late of London England. Is there somebody on this list can point me where I can locate Otto's birth details and perhaps his working details? I have viewed this site hoping for a break through. Many thanks. Michele in Australia