Some years back I was doing research on this family for a friend of mine. I have attached photos of Liborius Haase's gravestone which was deeply buried and is very eroded. A volunteer who lives in the area of the cemetery kindly unearthed the stone and sent me photos of it. There is a second name on the gravestone "Katharina".
St. Stephen's Cemetery, New Coeln, Wisconsin
Looks to me like it says:
At top: Hier ruhet or Hier rust
??? 10 Juli 18
??? 28 Mai 1907
??? 3 Marz 1821
??? 19 Dez 18_9