This is probably the barrow mentioned in the list of lows in Plot. “;and that other in a field near the left hand the way, as you pass between Mathfield and Ellaston near Colwich-Common, without a name; and another larger over against it, at the other end of the common, which they call Row-Low.” Source: “The Natural History of Stafford-shire” Plot, R. 1686 p.404 paragraph 21.
So Calwich Low and Row Low both have names attached so the barrow near The Boxes is probably the one ‘without a name’.