Sandberg/Wollner - Sandefjord - shipwreck

I have a gt gt aunt, Petra Henriette, born Sandberg in Sandefjord in 1865. She married a captain, Johan Henrik Wollner who I believe was from Germany. Family history has it that in 1893 the were both drowned off the coast of Scotland with most of the ship's crew. One of the survivors returned to Sandefjord with this story. I would love to find more information on this. Thank-you [:)]