Complex sentence: He is not publicly well known for his actions at the Convention because he never kept a record of his actions or experiences at the Convention, unlike other prominent figures at the convention such as Sherman's Rival, James Madison.
Split into simpler sentences: He is not publicly well known for his actions at the Convention because he never kept a record of his actions or experiences at the Convention. Unlike other prominent figures at the convention such as Shermans Rival, James Madison.