Rock musicians began exploring electric slide guitar in the early 1960s. In the UK, groups such as the Rolling Stones, who were fans of Chicago blues and Chess Records artists in particular, began recording songs by Muddy Waters, Howlin' Wolf, and others.[12] The Stones' second single, "I Wanna Be Your Man" (1963), featured a slide guitar break by Brian Jones, which may be the first appearance of a slide on a rock record.[43] Critic Richie Unterberger commented, "Particularly outstanding was Brian Jones's slide guitar, whose wailing howl gave the tune a raunchy bluesiness missing in the Beatles' more straightforward rock 'n' roll arrangement."[44] Jones also played slide on their 1964 single "Little Red Rooster", which reached number one on the British charts.[45][46][47] One of his last contributions to a Stones recording was his acoustic guitar slide playing on "No Expectations", which biographer Paul Trynka describes as "subtle, totally without bombast or overemphasis ... the perfect embodiment of the journey he'd embarked on in 1961."[48]