River, Railway and Ravine by Douglas Harper - Reviewed by Duncan Harley
At 164pp and profusely illustrated, Douglas Harper’s book examines both the provenance and the history of the patented, made in Aberdeen, Harper and Co rigid suspension bridge. Until now little documented, the Harper bridges were among the first suspension bridge designs - not to be confused with the “Shakkin’ Briggies” well known in the NE - to employ steel wire rope in order to form a relatively rigid and therefore highly functional bridge. Harpers manufactured over sixty such bridges for export throughout the British Empire between 1870 and 1910. Douglas, a direct descendant of the original bridge engineers, has spent over a decade researching the company’s innovative designs and seeking out surviving examples. The mid 19 th C was a period of rapid industrial growth both in the north east of Scotland and throughout the British Empire. The boom times of railway expansion had opened up new markets and stimulated engineering innovation on a scale rarely seen before. F...