of the Purple Sage's final appearances at the Fillmore East in April 1971. In 1969, Garcia played pedal steel on three notable outside recordings: the track "The Farm" on the Jefferson Airplane album Volunteers, the track "Oh Mommy" by Brewer and Shipley and the hit single "Teach Your Children" by Crosby, Stills, Nash & Young from their album Déjà Vu, released in 1970. Garcia played on the latter album in exchange for harmony lessons for the Grateful Dead, who were at the time recording Workingman's Dead. In 1971, Garcia began playing a sunburst Les Paul. In March and April 1971 – the time period during which the Grateful Dead recorded its second live album, Grateful Dead – Garcia played the "Peanut," a guitar he had received from Rick Turner, who had custom built the guitar's body and incorporated the neck, pickups, and hardware from an early '60s Les Paul. In May, Garcia began using a 1955 natural finish Stratocaster that had been given to him by Graham Nash in 1969. Garcia added an alligator sticker to the pickguard in the fall of 1971, and the thusly-named "Alligator" would remain Garcia's principal electric guitar until August 1973. In the summer of 1971, Garcia also played a double-cutaway Les Paul TV Junior. While Alligator was in the shop in the summer of 1972, he briefly reverted to the sunburst Stratocaster; this can be seen in Sunshine Daydream. In late 1972, Garcia purchased the first guitar ("Eagle") made by Alembic luthier Doug Irwin for $850 (). Enamored of Irwin's talents, he immediately commissioned his own custom instrument. This guitar, nicknamed "Wolf" for a memorable sticker Garcia added below the tailpiece, was delivered in May 1973 and replaced Alligator on stage in September. It cost $1,500 (), an extremely high price for the era. Wolf was made with an ebony fingerboard and featured numerous embellishments like alternating grain designs in the headstock, ivory inlays, and fret marker dots made of sterling silver. The body was composed of western maple wood which had a core of purpleheart. Garcia later had Irwin (who ultimately left Alembic to start his own business) replace the electronics inside the guitar, at which point he added his own logo to the headstock alongside the Alembic logo. The system included two interchangeable plates for configuring pickups: one was made for strictly single coils, while the other accommodated humbuckers. Shortly after receiving