Alongside his latter two projects, he was based as Chief Mechanical Engineer at the Royal Ordnance Factories, Woolwich, from 1889 to 1903, during which period he also served as its Deputy Director-General in 1898-99.
A third son, Sir Hay Frederick Donaldson, who became an eminent engineer, went with Lord Kitchener on a special mission to Russia in 1916 and was drowned in the Hampshire.
Frederick the Great | Frederick | Frederick II | Frederick II, Holy Roman Emperor | Frederick Russell Burnham | Frederick Roberts, 1st Earl Roberts | Frederick Law Olmsted | Frederick I, Holy Roman Emperor | Frederick Forsyth | Frederick Douglass | Frederick, Maryland | Prince Frederick, Duke of York and Albany | Frederick III | Frederick I | Frederick Delius | Frederick William III of Prussia | John Frederick II, Duke of Saxony | Frederick III, German Emperor | Frederick William IV of Prussia | Frederick Schomberg, 1st Duke of Schomberg | Frederick I, Margrave of Brandenburg-Ansbach | Frederick III, Holy Roman Emperor | Lou Donaldson | Hay-on-Wye | Hay Fever | Frederick, Prince of Wales | John Hay Whitney | Frederick Funston | Frederick Ashton | John Frederick II |