Colliery survey in progress 1878
Surveyor looking through the sighting arms of his miner's dial towards the assistant's lamp. The assistant has the end hand loop of a surveying chain (22 links equals one chain, remember?) in his hand.
Entitled "surveying under difficulties". Must be catching up with a survey in workings which have flooded in the meantime. Surveyors were usually called in once a month or even longer periods to update the survey rather than being employed full time.
Colliery survey in progress 1878
Surveyor looking through the sighting arms of his miner's dial towards the assistant's lamp. The assistant has the end hand loop of a surveying chain (22 links equals one chain, remember?) in his hand.
Entitled "surveying under difficulties". Must be catching up with a survey in workings which have flooded in the meantime. Surveyors were usually called in once a month or even longer periods to update the survey rather than being employed full time.