One of the leather strap anchors on Mary’s giant haul-everything-to-a-concert(*) handbag pulled its rivet through the canvas fabric:
We knotted the strap around the zippered opening and completed the mission.
Of course, it wouldn’t have pulled through if they’d splurged on washers, but noooo too expensive:
Some rummaging produced a pan-head M3 screw of suitable length:
A slightly battered acorn nut was a special treat for the inside, with another washer to keep me happy:
That was easy!