On March 19, 1970, an advertisement appeared in the Mansfield News Journal for an Iron Butterfly Concert at Ashland College the following evening, with Glass Harp listed as the opening band (erroneously printed as "The Grass Harp"). Underneath "The Grass Harp", a caption read "They Jam with Jimi Hendrix". Glass Harp had not in fact appeared anywhere with Jimi Hendrix (they were at that time still a local band to Northeast Ohio with little or no following nationally). It is unknown whether or not the promoter or Glass Harp's then-management directed that the statement be placed in the advertisement, but it is believed to be the first instance of any rumor regarding Hendrix in relation to Keaggy/Glass Harp.