Singing cowboy Roy Rogers will be the subject of a four-CD boxed set. Rhino Records has scheduled a May 18 street date for "King Of The Cowboys: The Roy Rogers Box," a 94-track collection of mostly unreleased songs by the radio, film, and TV star known for his harmonic yodeling. The package, which spans Rogers' 60-year recording career, features such classics as "Home On The Range," "Don't Fence Me In," "A Four Legged Friend," and "Happy Trails," as well as never-before-aired radio rehearsals, alternate versions, and duets between Rogers and his wife, Dale Evans.

In addition, the set comes with extensive liner notes by Laurence Zwinsohn, a friend of the Rogers family; an essay by music journalist Holly George-Warren; and a complete Rogers filmography. The package's suggested retail price is $49.98.