| Description | Letter to James Riddel containing a newspaper clipping: "Sir, I have taken the liberty of soliciting your permission to insert the enclosed advertisement in the 'Glasgow Mercantile Shipping List' of Friday first- I herewith send you a copy. Your answer in course of past will much oblige. Sir, your most obedient servant, of William Martin- Manager, Robert Duncan." Newspaper clipping is titled 'Aberdeen Harbour- To owners of steam tug or towing vessels." |