Complex sentence: Finally on May 18,1801, Fairbanks was determined to force her to make up her mind and met with Fales in a birch grove next to "Mason's pasture" in Dedham, though the exact location today is not known.
Split into simpler sentences: Finally on May 18,1801, Fairbanks was determined to force her to make up her mind. He met with Fales in a birch grove next to "Mason's pasture" in Dedham, though the exact location today is not known.