Sir, – As a student, I took a summer job as a security attendant in the National Gallery of Ireland. I once had to ask an elderly gentleman to stand back from a painting as he had activated a silent alarm. He smiled and politely informed me he was the artist. After a quick glance at the painting, A Family, and another quick glance at the man in front of me, I mumbled an apology to Louis le Brocquy and went back on my rounds! – Yours, etc,