I see this is your first posting on Rootsweb. When you post, it is important to provide some criteria information about the persons you seek. If you have their full date of birth that is very helpful. In this case the name was unique and you did post the year and place of death. If you were seeking a Mary Smith that died in 1896, without further information, you probably would not receive any. I checked your profile for a posted family tree, but you do not have one that may have given more information. This shows an ancestry profile, but not necessarily an Ancestry.com membership.
This shows she was born October 28, 1840 and died June 20, 1896. There are a number of Tschacher also buried there.
There a a number of posted family trees on Ancestry containing Mary (Maria Graf). One:http://trees.ancestry.com/tree/3087959/person/6177160929
owned by Kvetons shows Maria was born in St. Peters, Austria Hungary to Michael Graf and Elizabeth Lang, but there is no source for that information. A lot of posted trees have the wrong information. Andrew Tschacher was born 28 March in Szentandräs, Moson, Hungary(Austria), died 11 Oct 1927 in Alliance, Box Butte, Nebraska. The 1910 census identified his immigration in 1874. Since the first of his four children were born in Austria, he married Maria/Mary there prior to arrival. OR, she was not his first wife. On 27 Mar 1897 he married Katrena Ramar Stifter in Box Butte, per the tree information.