I did a little searching to see if I could find anything on Christian Laurits Christiansen in Denmark for you. His son Charles' WWI draft card notes that his father was born in Magleby Denmark. And the 1900 US census says that he was born in Apr 1870 and immigrated in 1885.
There was a 'Chr Laur Christiansen', 16, from Magleby who registered to emigrate to the US on Oct 11 1886 onboard the SS Geiser.
And looking in the Magleby parish register there was a Christian Laurits Christiansen born on Apr 14 1870 to Johan Christiansen and Jorgine Marie Gotfredsen.
(He also had at least 2 sisters, Anne and Hanne)
But even more interesting, when I added an exact bd to my Ancestry search I found him on a public family tree titled 'Jørgensen/Jorgensen' owned by 'karnj'. He has that line going back several more generations. You really should consider contacting him.
Hope this helps,