The site is a non-descript field where I had pulled six silvers the day before, and had deduced that there was a linear hot zone from my previous 2 days of detecting the site. I’m not sure why there should be such a hot zone (the research shows nothing), but its there, and I don’t care why, quite frankly. One of the silvers (the 10th, giving me the double), was a nice walker.
This was the 15th double digit day of my career. The full writeup (quite tedious) of the hunt is here.