I've not been to them but having lived at Howtown (just down the road) it looks like they're in the talus below the Arthurs Pike Crags (has a small distinctive slab on it), about 800m NE along the bridleway from the Swarthbeck Gill Boulders.
Personally I'd approach as for Swarth Beck boulders (in the Lakesbloc guide) and then detour to check them out.
Post edited at 20:20