I found this about 6 inches below the surface. It appears to be made of copper. The larger horseshoe is approx. 4" by 3 1/2" and has three small feet on the back. It kind of reminds me of a trivet. It is marked 28 Fowler House. The smaller one is about 2 1/4" by 1 7/8" inches in size. It is marked 25 Holland House. From checking local history I was able to find there was a Fowler House in town around 1856 to 1861 but there is no mention of a Holland House in this area. From what I was able to see on Google maps the address of the Fowler House may have been #28. A friend contacted the local historian and was told they may have something to do with the livery stable the Fowler house had. I have been unable to find any information regarding livery tags or anything else that these may have been used for. The area I live in ( Port Jervis, NY ) had the Delaware and Hudson Canal and the Erie Railroad going through it. Any help in identifying this would be greatly appreciated.