Looking for information on the Nicholas Steil family that was listed on the 1880 census in Highland Township, Iowa County, Wisconsin.

Nicholas Steil, Head, born abt 1850 in Louxembert,

Mary Steil, Wife, born abt 1857 in New York.
Looking for maiden name. Think it may be Malter.

Edward Steil, Son, born abt 1877 in Wisconsin.

This family was also listed on the 1900 census index in the same area. Would like census date for this period.

Thanks for any assistance.