PLEASE HEALP FAST!! In this excerpt from Treasure Island by Robert Louis Stevenson, which sentence helps develop the setting?

He was a very silent man by custom. All day he hung round the cove or upon the cliffs with a brass telescope; all evening he sat in a corner of the parlour next the fire and drank rum and water very strong. Mostly he would not speak when spoken to, only look up sudden and fierce and blow through his nose like a fog-horn; and we and the people who came about our house soon learned to let him be. Every day when he came back from his stroll he would ask if any seafaring men had gone by along the road. At first we thought it was the want of company of his own kind that made him ask this question, but at last we began to see he was desirous to avoid them. When a seaman did put up at the Admiral Benbow (as now and then some did, making by the coast road for Bristol) he would look in at him through the curtained door before he entered the parlour; and he was always sure to be as silent as a mouse when any such was present. For me, at least, there was no secret about the matter, for I was, in a way, a sharer in his alarms. He had taken me aside one day and promised me a silver fourpenny on the first of every month if I would only keep my “weather-eye open for a seafaring man with one leg” and let him know the moment he appeared. Often enough when the first of the month came round and I applied to him for my wage, he would only blow through his nose at me and stare me down, but before the week was out he was sure to think better of it, bring me my four-penny piece, and repeat his orders to look out for “the seafaring man with one leg.”