Golden Gulch or The Gulch on High Topps is where the Swallows, Amazons and Ds Mining Company finds an old working (or cave) with what turns out to be Copper Pyrites not Gold, in Pigeon Post. Slater Bob says the officer found gold by an old copper working … wi heather growing along a fault ... on the other side o’ t’ scar on High Topps (PP3). It is found by Roger (PP19). Later they hide in it from the fire (PP32). Captain Flint and Timothy decide to work the mine and to get Slater Bob to come and help as he had said he'd like to give slates a rest and have another go at metal (PP35).