Cailín Óg a Stór (Irish for "O Darling Young Girl") is a traditional Irish melody, originally accepted for publication in March 1582. It may be the source of Pistol's cryptic line in Henry V, Caleno custure me.It is part of a broadside collection from 1584. The poem "The Croppy Boy" was set to this music, and it was later used for the tune of "Lord Franklin", which was the basis for the Bob Dylan song "Bob Dylan's Dream".