In 1887, John Bartholomew's Gazetteer of the British Isles described Sheepwash like this:
Sheepwash, Northumberland. See ASHINGTON AND SHEEPWASH.
This is the only descriptive gazetter entry we have found, but you may be able to find further references to Sheepwash by doing a full-text search here.
Sorry, but no mentions of this place can be found.
This website includes two large libraries, of historical travel writing and of entries from nineteenth century gazetteers describing places. We have text from these sources available for these places near your location:
|Place||Mentioned in Travel Writing||Mentioned in Hist. Gazetteer|
|Newbiggin By the Sea||0||2|