Description | 'Sir, I have the honour to acknowledge the receipt of your letter of May 18th (T. 7341/04.) and enclosures with reference to the attendance of a British Delegate at the Fourth Congress of the International Scientific Commission of Aerostation which will take place at St. Petersburg in August next. I am, Sir, your obedient servant, Robt [Robert] Harrison Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. |