Complex sentence: Bomba was raised by an aged naturalist, Cody Casson (since deceased) and lives beyond the Great Rift (similar to, but smaller than, Tarzan's Escarpment).
Split into simpler sentences: Bomba was raised by an aged naturalist, Cody Casson (since deceased). He now lives beyond the Great Rift (similar to, but smaller than, Tarzan's Escarpment).