Journal and certificates on the fourth voyage of Mr. Blanchard : Who ascended from the Royal Military Academy, at Chelsea, The 16th of October, 1784, at 9 Minutes past Twelve O'Clock, and was accompanied, as far as Sunbury, By John Sheldon, Esq. Professor of Anatomy, and fellow of the Royal Society; And, from Sunbury, continued his Voyage, alone, to Rumsey, in Hampshire. Dedicated, by permission, To his grace, The Duke of Northumberland