Hello Everyone,
I agree about the perpendicular plug cutting procedure. There are also other methods of cutting a proper plug (horse shoe, slit…etc) that can be used. I have the pleasure of hunting old historical homes, very old privately owned homes and town sites. IMO the two most important things needed to learn are how to properly pinpoint and size a target. These two things reduce the trauma to the lawn (smaller plug) and reduce the fears of curious onlookers. I always use a cloth or small towel to place the removed dirt from the hole. Also, I only “dig” in the spring and fall at these sites since the ground is usually moist from rain and the heat is a minimum. In working on these sensitive sites perception is everything and the grass must look as it was before you were there. Lastly, I always share or give my finds to the home owner or town historical society. This always gets me an invitation back and more homes to dig due to word of mouth. To me it’s the fun of recovering something from the past and scratching it off my finds list.
Happy Hunting