Well spotted Anthony, great to see you are still out and about with an eager eye. I guess they are the two stones visible on Google Maps street view? https://www.google.ie/maps/@44.3541567,1.6654354,3a,63.2y,89.14h,77.2t/data=!3m7!1e1!3m5!1sokSBOcsAFFbX7vW4rSI6Bg!2e0!6shttps:%2F%2Fstreetviewpixels-pa.googleapis.com%2Fv1%2Fthumbnail%3Fcb_client%3Dmaps_sv.tactile%26w%3D900%26h%3D600%26pitch%3D12.795399439405472%26panoid%3DokSBOcsAFFbX7vW4rSI6Bg%26yaw%3D89.1436174440498!7i13312!8i6656?entry=ttu&g_ep=EgoyMDI1MDExNS4wIKXMDSoASAFQAw%3D%3D

They look genuine to me!