The Ordnance Boundary Stones (OBS) were erected around the perimeter of these four properties in Niagara-on-the-Lake almost 200 years ago. Some of these stones can still be seen today. Ordnance Boundary Stone #5 marks the boundary between railway land and the Garrison Reserve.On the 1817 map of the Plan of Forts Mississaga, George, and Niagara, the Military Reserves, and the Town of Newark, the Military Reserve extended to the corner of King and John Streets. By 1853 the boundary was moved to allow the Erie and Ontario Railway track to curve around to what is now the Heritage Trail. The line was constructed in 1854. The Erie and Ontario Railway became the Michigan Central Railway, as it appears on the 1910 map. The MCR came from the harbour, over the trestle bridge, down King Street, and then curved around at John Street, and continued along today’s Heritage Trail.