During the Crimean War (1854–1856), Barry got into an argument with Florence Nightingale. After Barry's death Nightingale wrote that: I never had such a blackguard rating in all my life – I who have had more than any woman – than from this Barry sitting on his horse, while I was crossing the Hospital Square with only my cap on in the sun. "He" kept me standing in the midst of quite a crowd of soldiers, Commissariat, servants, camp followers, etc., etc., every one of whom behaved like a gentleman during the scolding I received while "he" behaved like a brute . . . After "he" was dead, I was told that (Barry) was a woman . . . I should say that (Barry) was the most hardened creature I ever met.