This is not David Edgar’s first sortie into acting (After half a century of writing, Edgar steps on to the stage, 26 January). In the 60s, in his capacity as our playwright fellow at the University of Bradford, David played a fabulous Toad, in Toad of Toad Hall, embracing the part with gusto. Clearly acting was always his intention. Poop-poop!
Brighouse, West Yorkshire
• Leon Arden (Letters, 26 February) complains about not getting credit for his idea of a man reliving a day (used in his 1981 novel One Fine Day) in the film Groundhog Day. But what about Richard A Lupoff, whose 1973 short story 12:01PM has a man reliving the same hour of his life over and over?
• You refer to “former Blockhead Chaz Jankel” (Quincy Jones’s best moments, G2, 23 February). Ian Dury sadly died in 2000 but the Blockheads (including Chaz) are still going strong!
• Disappointing start to the week. No letters from professors, emeritus professors or professors emeritus in Monday’s letters pages. Is this connected with the university strike?
• In Finchley in the 30s, back when they had perpendicular and base instead of opposite and adjacent sides, my father simply learned “public house, beer house, pub” (Letters, 26 February).
Market Weighton, East Yorkshire
• The three basic trigonometric ratios became so deeply embedded in my brain during my professional life that I have struggled to remember how I first learned them in the 1960s. But I now recall that the mnemonic was “Pa has been here playing billiards”. We did not need to remember the order “sin, cos, tan” because that was their order in the book of log tables. Happy days!
Emeritus Professor Ian Hutchings
• Join the debate – email firstname.lastname@example.org
• Read more Guardian letters – click here to visit gu.com/letters