I have always wondered what the secret ingredient of baby wipes was (‘Perhaps they should have got the army in a little earlier’, 12 March), which I have used for many household purposes, notably to remove paint splatters. Now to hear they remove toxic chemicals, as per government guidelines, they are truly magic.
Margaret Vandecasteele
Wick, Caithness
• Once again Mrs May has appeared in a churchyard playing with a dog after her Sunday worship (12 March). We have clearly moved on from the established practice of featuring her leaving church with her husband. Are you preparing us for after Brexit, when we can expect to see her riding home from church on a unicorn?
Peter Munro
Congleton, Cheshire
• Penelope Horner’s mnemonic for the Phanerozoic timescale (Letters, 12 March) has forgotten the Paleocene, the start of which was notable for a large meteorite impact wiping out the dinosaurs.
Nigel Platt
Guildford, Surrey
• The most memorable mnemonic of my medical student days taught me (among other things) the order of the cranial nerves: “Oh! Oh! Oh! Please Tickle And Feel All Girls’ Vaginas And Hymens”.
Dr Dora Henry
Stratford-upon-Avon
• Aren’t we about due a letter from an emeritus professor explaining what makes mnemonics memorable?
Chris Baker
Willington, Derby
• Let’s not forget that Alf Tupper (Letters, 13 March) trained on that staple of fish and chips in between the odd fag.
Rob Canon
Sowerby Bridge, West Yorkshire
• Join the debate – email guardian.letters@theguardian.com
• Read more Guardian letters – click here to visit gu.com/letters
