Complex sentence: French should by rights have gone to the military commander of the besieged garrison, Lieutenant Colonel Kekewich; instead he called first on Cecil Rhodes, the former Prime Minister of Cape Colony and foremost imperialist, at the town's chief hotel.
Split into simpler sentences: French should by rights have gone to the military commander of the besieged garrison, Lieutenant Colonel Kekewich. Instead he called first on Cecil Rhodes, the former Prime Minister of Cape Colony and foremost Imperialist, at the town's chief hotel.