Nicolino Caylo‘s view of Baltimore, one of four images based on his brief sojourn here in 1835-1836, looks northwest towards the harbor from Locust Point. Federal Hill is on the left and the red brick buildings of the waterfront are on the right. The body of water is the Northwest branch of the Patapsco River which turns westward at the base of Federal Hill toward the Inner Harbor. Bay schooners are anchored along the waterfront lined with warehouses and docks. A steamboat called the Washington has entered the harbor, en route from Philadelphia. Its signal flag could be seen with the aid of a telescope from the Marine Observatory on Federal Hill. When the flag was sighted, a similar flag was raised on the flagstaff on Federal Hill to inform the ship’s owner that his boat was approaching.