Complex sentence: Upon General Lee's death, Davis agreed to preside over the memorial meeting in Richmond on November 3,1870, which prompted further invitations, although he declined them until July 1871, when he was commencement speaker at the University of the South.
Split into simpler sentences: Upon General Lee's death, Davis agreed to preside over the memorial meeting in Richmond on November 3,1870. That speech prompted further invitations, although he declined them until July 1871, when he was commencement speaker at the University of the South.