I have always wondered about one nautical aspect and was hoping that with so many people with seagoing experience here someone may have the right answer. Does anyone know who, when and where discovered the concept of using lookouts positioned at a height much higher than the topmost deck? I checked on-line and the information was somewhat vague, suggesting that in the West at least it was around the early 19th century. But I thought ship lookouts were used much earlier, perhaps in other cultures? In fictional tales like Sinbad the Sailor, there appear to be lookouts high up on the mast.