Complex sentence: A fan of birdwatching from his earliest memories, Bill kept cormarants in his facial foliage for many years though quarantine regulations precluded his taking of them on foreign tours, once his career as cricket's voice of numbers took off.
Split into simpler sentences: A fan of birdwatching from his earliest memories, Bill kept cormarants in his facial foliage for many years. Though quanrantine regulations precluded his taking of them on foreign tours, once his career as cricket's voice of numbers took off.