However , rich discoveries in 1891 at the Golden Gate reef to the northwest compensated for this .
Some mines close to Croydon township failed around 1890 when the ore was found to be cut by a wall of granite .
Rich discoveries in 1891 at the Golden Gate reef to the northwest compensated for this .
Some mines close to Croydon township failed around 1890 when the ore was found to be cut by a wall of granite .