In 1822, a pair of range lights was built to guide ships into Baltimore Harbor. A ship approaching the lights was on course to enter the Patapsco River if the range lights lined up.

Architect Benjamin Latrobe was consulted on construction of the range lights - he recommended stone or brick to minimize the risk of fire. The eastern (lower) light was a 27-foot high stone tower connected to the shore by a 2000-foot bridge. Thomas Evans and William Coppuck received the contract to build the eastern light. Like their work at Bodkin Island, the work was substandard. Supervising naval officer William P. Barney reported that "it became necessary to employ a person at one dollar per day, to overlook them during the time they were at work."

The western (upper) light was a 35-foot stone tower 700 yards from the eastern light, and 100 yards from shore. The light was built later in the same year by Freize and Ring.

The range lights were tended by a single keeper, who was paid nearly double the usual wage. The first keeper, a member of the Maryland House of Delegates, was granted a leave of absence to attend the assembly session in Annapolis.

The lights were frequently criticized as ineffective. When the (Lower) Craighill Channel lights were built, the North Point Lights were discontinued and abandoned. When the Upper Craighill Channel lights were built, the western tower was removed and the foundation used for the front range light.

References (see links)

Forgotten Beacons, Hornberger and Turbyville p. 17
The Lighthouses of the Chesapeake, de Gast p. 162
Lighting the Bay: Tales of Chesapeake Lighthouses, Vojtech pp. 74, 161