At Toulon, Graham distinguished himself by his courage and energy: for instance, on one occasion, when a private soldier was killed, Graham snatched up his musket and took his place at the head of the attacking column. In a general order referring to the repulse of an attack by the French on an important fort, Mulgrave expressed "his grateful sense of the friendly and important assistance which he had received in many difficult moments from Mr. Graham, and to add his tribute of praise to the general voice of the British and Piedmontese officers of his column, who saw with so much pleasure and applause the gallant example which Mr. Graham set to the whole column, in the foremost point of every attack".