At the time her will was signed, Barbara Haase made "her mark."
Readers should note that simply making a "mark" does not mean the person was illiterate. They might have been unable to sign or perhaps were told to "make their mark." That's one reason why documents such as this have witnesses.
Barbara could sign her name--she did so on documents in the 1850s and 1860s in a lovely German script. Not certain why she made three marks--although she did have three husbands (or two or four, depends upon how you count).
Issue 16 of Casefile Clues discusses how Barbara's town lot was settled up after her demise-several interesting lessons there.