Do I get a prize, seeing as I was the only one who got closest to getting 2 out of 3 right?
Sorry RW, you're quite right. You were the first to identify Blind Tarn, and the only one to have a go at the gridref, which you correctly spotted was on the ascent of Hartsop Dodd - I think it was actually taken from about NY 409122. Surprised there weren't a few more entries for that question, as the last UKRW expedition was actually based by Brothers Water.
A third of a cigar is in the post (or maybe even two-thirds).
I missed this one, and I've only got a 1:50000 map handy, but it's about NY 408 128. Some interesting bits of disused mine around there. The very obvious hole from the path to Hayeswater is well worth a look ;-)