Duberly again accompanied her husband when the 8th Hussars were sent to India in 1856, travelling on the SS "Great Britain" which departed from Cork 24 September 1857 and arrived in Mumbai 17 December. She stayed with him throughout the final months of the Sepoy Mutiny. She was adamant about accompanying the troops on campaign and told her sister that she would "stain my face and hands and adopt the Hindoo caftan and turban," refusing to stay behind. At Gwalior in June 1858, while watching the start of a cavalry charge, her horse ran after the rest and, instead of holding back, she told her husband "I must go!" and galloped away.