Aberdeen Harbour Board: Bundle 8: Copy of Letter to Robert Stephenson Esquire, Civil Engineer, Edinburgh, from James Riddell, Shoredues Office Robert Stephenson was sent a comparative statement of the tonnages and trades of Aberdeen Harbour covering different periods from 1810 to 1829 (statement included on same letter paper). James Riddell remarks on the implications of certain trends seen. The adjoining statement gives figures for each year from 1815 to 1829; it notes the harbour was let on lease between 1810 and 1814 and gives an average yearly tonnage for those years. 3 Oct 1829