Walls and history

This morning the builder man arrived to work on the vegetable garden walls. There was a lot of head scratching and a little digger involved and the process did not seem easy - and the stones weren't too big.
We then walked up on the moor at the far side of Widecombe-0n-the-Moor and as we followed the ridge we saw this wall - a wall that went of for about three kilometres. It wasn't built yesterday and so would have been made without that little digger or indeed any such mechanical aids. The stones were huge but it was clearly put together with real attention to detail - for something that at the time would, I imagine, have been seen as being purely utilitarian.
Was it achieved so beautifully because of pride in workmanship? Fear of the paying customer? A desire to see one's work as a lasting memorial?
Either way, it is a fitting memorial albeit to an unknown set of workers. What will some of our current constructions look like in a hundred years time? Three and a half thousand years time?
The latter is how old the ruins were as Grimspound, the next destination on our walk along the ridge. The outer wall and several hut circles are still clearly visible in a spectacular setting. Well worth the walk.