Richard Long has observed that the best and safest way to cross Dartmoor is to walk in a straight line, but in the city things are rarely so simple. Long’s important exhibition at The National Gallery of Modern Art was postponed to another day, and I shall postpone it to a review of its own, while I follow our ramblings southwards towards the Old City, seeking out addresses my friend had given me. As sophisticated and rational as Edinburgh may be, at least the New Town, certain prospects encourage one to think of it as a city of the earth. It is mostly built of stone, after all, as neatly chiselled as it may be. As you turn the corner around the façade of the new Parliament, Arthur’s Seat, an extinct volcano, appears ready to swallow it up...or is that only wishful thinking? The classical structures on Calton Hill, stone-built as they are, only draw attention to the chthonic presence of the eminence on which they stand. (Like Rome, Edinburgh has seven hills: Calton Hill, Castle Hill, Corstorphine Hill, Craiglockhart Hill, Braid Hills, Blackford Hill, Arthur’s Seat.) This theme, moreover, had its way of cropping up, not only in Richard Long, but in other exhibitions as well.