A. R. Andrew—The Dolgelley Gold-belt. 207 
with blende and chalcopyrite; the lode may be traced for over 
half a mile. 
2. The north copper lode, parallel to the above and vertical; 
it varies in width from 2 inches to 2 feet, and there seems to be no 
system in its thickening and thinning. Like most of the Welsh gold 
lodes, its walls are ill-defined ; it may be traced at intervals for about 
1 mile. The quartz of this lode carries a great deal of chalcopyrite. 
Besides the weathering products of the copper pyrites, the only 
other mineral present is pyrrhotite, and that in small quantity only. 
There is a north and south lode, which intersects this lode, and to the 
west of the junction the main lode becomes much thinner, but much 
richer in copper. 
3. The middle lode is south of the previous one; it strikes 40° 
east of north, is again practically vertical, and may be traced for half 
amile. This lode is opened up at two levels: in the upper, good 
copper ore is found in the neighbourhood of a north and south cross- 
course ; in the lower level (180 feet below) the lode is poorly defined 
and carries no copper values. 
4. The north-and-south lode, which is not worked, is poorly 
mineralized ; there is only a very small amount of galena, blende, and 
chalcopyrite. The lode is of importance only on account of the effect 
it appears to have on the copper values in the north copper lode. It 
dips strongly towards the west at an angle of about 45°. 
All these lodes are found in the Vigra Beds of the Maentwrog. 
Cae-Gwian Lode.—This is a poorly defined and little developed lode, 
about 2 miles up the stream which flows into the estuary at Pont 
Glandwr. The strike of the lode is about 30° east of north, and the 
dip is 80° towards the west; it may be roughly traced for 14 miles ; 
the width is irregular, averaging about 1 foot. Copper pyrites and 
iron pyrites, with oxides of iron and manganese, are seen in the 
’ outcrops, and are present in very small quantity only. The southern 
end of the lode is seen in the Pen Rhos Beds; going north, the lode 
enters and crosses the Vigra, and finally in the Clogau Beds comes to: 
a termination against the Llynbodlyn fault. 
Farchynys Lodes.—On the edge of the estuary immediately south of 
Farchynys House, there are several outcrops of quartz belonging to. 
three sets of vertical veins, striking 40° east of north; these can be 
traced only a short distance. The lodes are on the average about 
2 feet wide, and are poorly mineralized. A small amount of mining 
work has been done and gold obtained, assays conducted by Readwin 
giving 6 dwt. of gold per ton. This lode lies well up in the Pen Rhos 
Beds of the Maentwrog. 
Buwleh-coch-uchaf Lode.—To the east of the Cae-gwian lode, and on 
the east side of the Llynbodlyn fault, there is a parallel lode striking 
30° east of north; it is only traceable for a distance of 500 yards; its 
width is about 1 foot on the average; copper pyrites and iron pyrites 
are seen in the lode. The lode cuts through the Vigra Beds and skirts 
the edge of a sill of greenstone. 
Hafod-uchaf Copper Lode.—This is probably a continuation of the 
Bwlch-coch-uchaf lode, though no trace of a lode formation can be 
seen in the partially drift-coloured 1000 yards which intervene. The 
