"The Line-Engraved Postage Stamps of Great Britain Printed by Perkins, Bacon and Co." by E.D. Bacon; "The Essays, Proofs, Colour Trials & Reprints of the Line-Engraved Postage Stamps of Great Britain Printed by Perkins, Bacon & Co." by E.D. Bacon; "Board of Inland Revenue. Perforation of Postage Stamps 1847-1862" for Henry Archer's Patent; "The Royal Collection" clothbound in box, also a boxed set of the Great Britain section only; An apparently complete set of photocopies of the 1d. imprimatur sheets held by the N.P.M.; mostly fine