Read it through once

At short intervals along the Spanish shore were quaint-looking old stone towers--Moorish, we thought--but learned better afterwards. In former times the Morocco rascals used to coast along the Spanish Main in their boats till a safe opportunity seemed to present itself, and then dart in and capture a Spanish village and carry off all the pretty women they could find. It was a pleasant business, and was very popular. The Spaniards built these watchtowers on the hills to enable them to keep a sharper lookout on the Moroccan speculators.