 Complete the following phrase:  Returning to England in 1784, he was promoted Captain 1785, then next saw active service in 1793 in the Campaign in the Low Countries, where he was aide-de-camp to the Duke of York. Sent to discuss surrender terms with the garrison of Valenciennes, he was present at the Siege of Dunkirk 25 Aug-10 September, and the relief of Menin on the 15th. Detached to the Austrian staff of Coburg, he was present at the 