Complex sentence: Historically, Louis XVI was deposed on August 10,1792, and the monarchy officially abolished on September 21,1792, so it can be supposed that Connor's failed execution occurred between April and August of 1792.
Split into simpler sentences: Historically, Louis XVI was deposed on August 10,1792, and the monarchy officially abolished on September 21,1792. So it can be supposed that Connor's failed execution occurred between April and August of 1792.