They grew with such abundance on the upper slopes of the valley that the berries were regularly sold at markets in Hawes and Settle.

[19][20] The Pennine Way skirts to the west of the summit of Dodd Fell and traverses the high ground separating Widdale from Sleddale.

"[23] The underlying rock in the valley is from the Yoredale Series and mainly consists of limestone, shale and sandstone.

[24] Just below the Middle Limestone formation lies a narrow coal seam which was exploited in Sleddale (and nearby Cotterdale too).

[25] The thin layer of coal is attributed to small swamps which developed here rather than the extensive bogs that led to deeper and better coalfields elsewhere in Yorkshire and the North of England.

[26] Four mines are known to have existed in the upper dale; West Duerley, Storth, Scar Head and Bank Gill Colliery.

[28] The spoil heaps from these workings, which consist largely of shale and iron nodules, still scar the upper valley landscape.