Silver Quarter and Trespassers

I am always on the lookout for places to detect.  I found one and went through the land owners to get the proper permission.  Showed up at the site later that day and there are two guys detecting on it.  I didn't talk to them, but they left right after I got there.  I guess they saw an opportunity to detect a newly mowed lot where an old house used to be and decided to see if they could get away with it.  It was also obvious that the site had been detected before, but I still managed to pull two good coins.  A 1919s wheat cent and a 1934 Washington Quarter.