Katie Paterson has created the 30th and final work for Ingleby Gallery's public art project Billboard for Edinburgh. Paterson's billboard image is one of her Ideas sentences. These are short haiku-like statements reveal some of Paterson's most exciting and seemingly impossible ideas. Paterson has gone on to realise a number of these poetic phrases as physical artworks. What gradually becomes clear with Paterson's work is that the distance between the realised and the unrealisable is not to be relied upon.