This cache may or may not have been on the route of the 1240 perambulation. More details about the Perambulation can be found on the cache page for the Dartmoor Forest Bonus. On the front page of the logbook is an adjustment to be made to the Bonus co-ordinates, which you will need to find the Bonus.
The 1240 perambulation was the first to establish the boundary of the Forest of Dartmoor but it was not the last. In 1609, a further jury of 12 men were instructed to survey the boundary by perambulation, and they returned a report based on what they “[did] fynde partlie by the coppies of auncient recordes ptlie. upon the evidence of other p'sens and ptlie. upon their ovvne knowledge, but especiallie as the boundes have been and are used and accustomed to be”.
In their report, these jurors mentioned Wester Redlake as one of the boundaries. Today, this relatively small stream still marks part of the boundary between the Willsworthy and Okehampton military ranges.
Red Lake Coombe is a sizeable valley for the small stream that created it, which drains into the Tavy at this point. The cache is near the WD22 marker, a military boundary stone for the Willsworthy range. At this point the Tavy curves northward, and you can see Hare Tor looming over Tavy Cleave to the north. Looking east along the river you can see Fur Tor and Little Kneeset in the distance.
If doing this cache as a standalone, the closest parking is at Lane End (waypoint below). From the parking head along the farm track to a bridge that crosses the leat. DO NOT cross the leat, but follow its southern bank until you get to its weir. Cross the leat here and follow the northern bank of the Tavy to Rattlebrook foot. Cross Rattlebrook at the suggested point below (XING 1), and head up the Tavy to the suggested second crossing (XING 2) and backtrack to the cache.
If doing the Perambulation as a route, the next point on is Rakernesbrokysfote. The Tavy is not easy to cross at this point, but I found a reasonable crossing point a few hundred metres upstream (XING 2), where it is possible to cross with dry feet. I imagine it would be dangerous when the river is in flood. After crossing head back down the Tavy to Rattlebrook.
Please Note: This is a Military Training Area on which live firing and other pyrotechnics may be used. The cache is within Willsworthy Range, and XING2 is within the Okehampton Range. The area is generally open public access. One of the safety rules for public access is:- Do not, (and ensure that children do not) approach, touch or pick up any metal objects lying on the ground. Please obey all byelaws and locally posted information concerning times when the area may be closed. These may be physical barriers, flags or lights. Please see the Dartmoor Firing Notices to see when the range is active.