RAINBOW TRIAL - 1d DEEP BLUE STRIP OF FOUR ENDORSED BY EDWIN HILL:1d deep blue Rainbow Trial strip of four from the foot of the pane on white plain wove paper in blue with a mixture of Prussiate of Potash and Chinese White in the ink (Spec DP 20b). A superb strip from the foot of the pane of twelve with margins on three sides. Endorsed at foot by Edwin Hill "F 1/2 Pruss & 1/2 Chi blue plain". Exceptional. Ex D Rowse and illustrated on page 136 of his book "Rainbow Trials". (Image)

RAINBOW TRIAL - 1d LILAC PINK: State 2 on white paper dipped in prussiate of potash, a wide margined example showing the distinctive ivory head. Fine. SG Spec DP20a £3,500. (Image)

RAINBOW TRIAL - 1d DARK OLIVE-GREEN on "40" ( ?1840) watermarked thick bluish laid paper, an upper left corner example with m/s "Plain" in margin. Trace of marginal wrinkle mentioned for accuracy only. Rare SG Spec DP20d. (Image)

RAINBOW TRIAL - 1d deep blue: State 2 with voided corners, on stout roughish white wove paper. Close but clear margins on all sides. Fine. SG Spec. DP20B State 2 from £3,500. D Brandon Cert (1993). (Image)

1850 PRINCE CONSORT BROWN ESSAY:A marginal finished imperforate example from the right of the sheet. Three wide margins, just touched at foot and light horizontal crease. Central dent not visible on face. Scarce. SG Spec. DP71 from £2,000. (Image)