Comprising 18 books and 10 manuscripts. The collection belonged to Dave and Kate Hunter, friend to whom Roberts dedicated Ladies from Hell. The only connection between Dave Hunter and Roberts I can find is that Hunter is listed as the interior illustrator for Missa Privata in New Worlds. A wonderful collection. 

Books: 
(1) Pavana [Rupert Hart-Davis, 1968, unsigned, owner's signature (not D or K)] 
(2) The Inner Wheel [Doubleday, 1970, Inscribed to D&K] 
(3) The Boat of Fate [Hutchinson, 1971, Inscribed to D alone, and dated 1971. Tear to the jacket] 
(4) Machines and Men [Hutchinson, 1973, Inscribed to D&K and dated 1973] 
(5) The Chalk Giants [Hutchinson, 1974, Inscribed to D&K and dated 1974] 
(6) The Grain Kings [Hutchinson, 1976, Inscribed to D&K and dated 1976] 
(7) Anita [Millington, 1976, Inscribed to D&K and dated 1976] 
(8) Les Geants de Craie [Editions Opta, 1976, Inscribed to D&K and dated, 1977] 
(9) Ladies From Hell [Gollancz, 1979, The Dedication Copy, signed without inscription beneath the dedication to D&K] 
(10) Molly Zero [Gollancz, 1980, Inscribed to D&K and dated 1980] 
(11) Kaeti & Company [Kerosina, 1986, Inscribed to D&K and dated 1986. With Kaeti and Kerria plate, with the Kaeti's Apocalypse chapbook 229 of 300 copies unsigned] 
(12) Grainne [Kerosina, 1987, Unsigned] 
(13) Grainne [Kerosina, 1987, 21/250, signed as issued. In slipcase with A Heron Caught in the Wind] 
(14) The Road to Paradise [Keronsina, 1988, Inscribed to D&K and dated 1989] 
(15) Irish Encounters [Kerosina, 1988, Inscribed to D&K and dated 1989. 315 of 600 copies] 
(16) The Natural History of the P.H. [Kerosina, 1988, Inscribed to D&K and dated 1989. 116 of 525 copies] 
(17) Winterwood and Other Hauntings [Morrigan, 1989, Inscribed to D&K and dated 1989] 
(18) Kaeti on Tour [Sirius, 1992, Inscribed to D&K and dated 1992]. 

MSS: 
(1) Spanbroekmolen [1980, 13pp, Inscribed to D&K. Copy 4 of 12. Additionally signed to the end as issued. Roberts appears to have created duplicates of his mss to send to various people 
(2) An Irish Reconnaissance [1979, 59pp. Unbound, rectos only, presumably 12 copies produced given the distro list at the beginning. Handwritten covers and emblem] 
(3) An American Hospital in England [2pp rectos, w/ TLS to David [1966, 2pp rectos]] 
(4) The Will of God [1989, c40pp, TNS laid in] 
(5) Kaeti's Apocalypse [n.d. [<1986, 13pp, rectos only] 
(6) Poste Restante [n.d. 39pp, unbound] 
(7) Our Lady of Desperation [n.d. c40pp, unbound, xerox] 
(8) Kaeti and the Potman [n.d. ~1986, 12pp] 
(9) Kaeti's Nights [1982, 45pp rectos, inscribed to D&K and dated] 
(10) Some Observations from Senility [1997, 64pp. with a generic TLS (facs) and 2pp TLS to David, bound between pages 4 and 6.] 

Several of the mss here we can't track to publications, that's not to say they're unpublished just that we've been unable to find any details. Said mss are Irish Reconnaissance, American Hospital, Poste Restante, Some Observations. The latter could foreseeably have been published in Lemady given it's biographical nature, though for lack of a copy I can't confirm] [9149, Hyraxia Books].