"The Black Nag" is also known as "The Galloping Nag". It is an early version of the jig "Black Nag" that became popular with English country dancers and American contra dancers in the 1970's. The melody first appears in print as a new tune to the 3rd edition of Playford's Dancing Master (1657). As "The Galloping Nag" it appears in Walsh's Compleat Country Dancing Master (1718), and again in his 1731 edition. John and William Neal also published the tune (as "Galloping Nag") in their Choice Collection of Country Dances (Dublin, 1726). It is also similar (in both dance and tune) to "Millison's Jig" published in Playford's first edition of the Dancing Master (1651). "The Black Nag" was recorded on The English Country Dancing Master by The Telemann Society. I learned it from the recording on The Hammered Dulcimer by Fennig's All Stars.