E Bay is a wonderful way of finding things. This sign is a definite two-man lift. Click the picture to enlarge it. I bet that put the fear of God into would-be trespassers who risked parting with £10 - a tidy sum in 1906.
We have located the sign in a credible position on the south west corner of the tower.
I was helped to lift the sign into position by two visitors from Otley who really earned their trip to the top of the tower.