I found these on a mountain that was logged possibly between 1880 to 1930. I have located the location of the sawmill through my MD, finding a multitude of hand forged five and three inch nails. I have plotted their location, but have more work to do. The tractor or engine cover was found downhill and possibly 400 yards from the mill. The broken threaded pipe and the one foot pipe were found at where I assume the steam engine might have been placed. The round couplers were found 10 feet from the engine. There were about 15 to 20, but further investigation may reveal more. Any ideas on what the these items are or how they were used. Thanks in advance.