As well as this mine , Klondyke mine was worked together with numerous smaller adit workings which lay a little upstream in Geirionydd gorge .
Some of these latter working were strictly part of the Bryn Cenhadon Mine .
As well as this mine , Klondyke mine was worked together with numerous smaller adit workings which lay a little upstream in Geirionydd gorge , although some of these latter working were strictly part of the Bryn Cenhadon Mine .