The Rebel Invasion of Pennsylvania.; The Truth Regarding Some Important Historical Facts.
Not long after the Battle of Gettysburg a book about the battle was already in publication. The story of Big and Litte Round Tops however was not the story of Vincent's
Third Brigade, but told another story about Crawford's Pennsylvania Reserves. James Clay Rice, who would die at the battle of Spotsylvania the following year,
was able to weigh in on the matter before his death.
A month later General Sykes would send General Crawford a letter rebuking him for his and Fisher's attempts to steal credit away from the Third Brigade.
See: Sykes to Crawford
For a comparison of sources see: Big Round Top.