<img src="https://assets.podomatic.net/ts/16/97/2e/collectivegallery/1400x1400_9807569.jpg" alt="itunes pic" /><br />The third audio work in the Observers’ Walks series is by Tris Vonna-Michell. Tris has made a work centred on the pioneering calotype photography of David Octavius Hill, who worked with Robert Adamson at Rock House, which overlooks Waterloo Place on the south west side of Calton Hill. Funded by Outset, Scotland.