Proof A large piece of wove paper deeply blued with prussiate of potash, showing two impressions [9-10] in dull rose-red treated with various chemicals, showing manuscript "New Colour June 1st" and "4 Dipt P" in J.B. Bacon's handwriting; some creasing clear of the impressions. S.G. Spec. DP20F State 2a. Photo in colour for part