A 'Holy Grail' first edition of The Hobbit is set to sell for thousands at auction - after being discovered during a routine house clearance.<br /><br />The copy of J. R. R. Tolkien’s 1937 work was discovered tucked deep into an old bookcase at a home in Bristol.<br /><br />It is one of only 1,500 copies initially printed in September 1937. <br /><br />Such was its popularity that within weeks all copies had been sold and a second printing was undertaken. <br />