"Take a Letter Maria" is the debut single written and recorded by American soul singer R. B. Greaves. It was recorded at Muscle Shoals Sound Studio on August 19, 1969, using the house studio musicians. These include Donna Jean Thatcher on vocals (later Donna Jean Godchaux of the Grateful Dead), Roger Hawkins on drums, Barry Beckett on electric piano, Eddie Hinton and Jimmy Johnson on guitar, David Hood on bass, and Mel Lastie on trumpet. "Take a Letter Maria" was released in September 1969, quickly gained regular airplay. The single peaked at No. 2 on the Billboard Hot 100, and was kept from the top spot by the 5th Dimension's "Wedding Bell Blues".