While Spence is missed, the other band members are in good form, with guitarist Peter Lewis particularly strong. "I Am Not Willing" and "If You Can't Learn From My Mistakes" are songs in an early country-rock vein and feature his delicate picking. Mosley contributes a tough rocker, "Hoochie" and a folkie-pop ballad "It's a Beautiful Day Today". Even Spence has a ghostly presence, in the form of his dark, foreboding "Seeing", recorded partially before his exit, and one of his and Moby Grape's finest songs.
The next blow (and surprise) for the band came when Bob Mosley, who had become a key member through his songwriting and strong vocal presence, decided to enlist in the Marine Corps. With little choice but to fulfill their contractual obligations, the band, now the trio of Lewis, Stevenson, and Miller cut and released Truly Fine Citizen in late 1969. Recorded in Nashville in two days flat with sessionmen, it is a better album than could be expected under the circumstances; "Right Before My Eyes" is a good country rock tune, and "Truly Fine Citizen" is a rocker that recalls their early work. Much of the rest is competent country/rock.
While none of this is on par with Moby Grape, it does suggest new avenues the band might have taken had they kept going. It didn't sell very well, peaking at #157.
The band disbanded at this point, but in 1971 the original lineup reunited for 20 Granite Creek Spence's participation was minimal; the mystical-sounding instrumental "Chinese Song" on which he plays a koto (a Japanese instrument). Much of the rest of the album is pretty good; with hard rocking moments, and an even more explicitly country-rock flavor. Although country-rock was big at the time, and Moby Grape came by it organically, the album barely entered the charts at #177. It's a shame; it got generally positive notice when it came out, and has aged better than much country-rock of the same era.
One more semi-serious attempt was made to revive the group in 1977; the group (Peter Lewis and Jerry Miller, with occasional help from Mosley and even Spence) played dates throughout the year, mostly around Santa Cruz. A document of this exists as Live Grape, released in 1978 (not including any nights Mosley played), and features a number of new songs.