Having tried LSD in the 1950s, he became an advisor to Timothy Leary and Richard Alpert in their early-1960s research work with psychedelic drugs at Harvard.
hˌævɪŋ tɹˈaɪd ˌɛlˌɛsdˈiː ɪnðə nˈaɪntiːnhˈʌndɹɪd fˈɪfti z, hiː bɪkˌeɪm ɐn ɐdvˈaɪzɚ tə tˈɪməθi lˈɪɹi ænd ɹˈɪtʃɚd ˈælpɚt ɪn ðɛɹ ˈɜːli nˈaɪntiːnhˈʌndɹɪd sˈɪksti z ɹᵻsˈɜːtʃ wˈɜːk wɪð sˌaɪkɪdˈɛlɪk dɹˈʌɡz æt hˈɑːɹvɚd.