One made a nest about 3' from the road, in tall weeds, just behind the mailboxes; it had about 20 eggs when I found her. We have an ancient metal fireplace insert in the shop which is used to burn wood to make a little heat in there in the winter. A couple weeks ago we found about a dozen eggs in there (no chicken.) They were black with soot as well as old oil. One pullet kept hunting for a place to nest nest in the shop. She turned over an open tray of socket wrenches and a made couple other messes, so I moved a nest box to one corner of the shop that she'd been checking out. Problem solved -- one little pullet egg a day in there since.