Sir, – The following biographers have used “the ignorant ‘Béal na mBláth’ form” (John A Murphy, August 16th): Margery Forester (1971), León Ó Broin (1983), Tim Pat Coogan (1990), Peter Hart (2005) and Chrissie Osborne (2007) – not just the media and participants in the annual Michael Collins Commemoration. – Yours, etc,