ATG letter: Imperforate Penny for your thoughts

Further to your report on the extremely rare Plate 77 Penny Red, offered for sale at a tempting £650,000 (News Digest, ATG No 2652), it might be of interest to readers who are neither philatelists, nor postal historians, to note that it was the imperforate Penny Red which replaced the Penny Black in February 1841, not the perforated Penny Red, like the example illustrated.