Grant directed the offensive reconnaissance of Belmont in the autumn.
On the 30th of June Sir Henry Lawrence ordered a reconnaissance in force from Lucknow, which met the enemy at Chinhat; but the native sepoys and artillerymen turned traitors, and Sir Henry was forced to retreat to the residency, where the siege now began.
The mission of Sir Francis Younghusband to Lhasa in 1904 resulted in an extension of the Indian system of triangulation which finally determined the geographical position of that city, and in a most valuable reconnaissance of the valleys of the Upper Brahmaputra and Indus by Captains C. H.
Agassiz, "A Reconnaissance of the Bahamas and of the Elevated Reefs of Cuba in the steam yacht ` Wild Duck,' January to April 1893," Bull.
His first expedition to Africa (1474) was a mere reconnaissance, but four y ears later a favourable opportunity for invasion arrived.