The other day I ordered a clearance pair of Doucal's double monks. I didn't know much about the brand, but I'd been wanting something rubber soled for rainy summer days outdoors. I had the impression Doucal's was somewhere mid-tier among Italian shoemakers and that I'd get something fairly decent. But when I got the shoes I was surprised to see no evidence anywhere of stitching on the soles (inside or out). Is there an explanation for this other than that the soles are glued? Or is it possible the stitching is hidden somehow? Everything else I own is American or British and Goodyear welted, so I don't have much experience with Blake welting (if that's what this is) or Italian construction. Though my impression is that Blake usually leaves visible stitching too. Any thoughts about what this is?