That changed, however, as other singers joined the group, which retained the close harmonies and precise rhythms of the original group, but now allowed each member the opportunity to solo on alternating leads. At their height in the late 1950s the Caravans combined the energetic, agile alto of Shirley Caesar on songs such as "Swing Low, Sweet Chariot" with the powerful contralto of Inez Andrews on "Mary Don't You Weep", the dramatic soprano of Delores Washington, and the frenetic piano style from Eddie Williams, a friend of Washington.