A meeting of four choirs is one better than three (sorry Worcester, Gloucester, Hereford!). And this great event happened on 15 June to mark Ralph Allwood's final term as Precentor of Eton College. The combination of the choirs of King's Cambridge, New College Oxford, Eton College and Winchester College didn't arise out of the blue. These four institutions have since the 1440s been signed up to an amicabilis concordia, an agreement promising mutual support in times of hardship. Fashioned to help the relatively new institutions survive the upheavals of 15th-century England, the concordia has not been tested in recent times, and it is indeed doubtful that its provisions would withstand modern implementation, let alone the scrutiny of the charity commissioners. The agreement does however have a vestige in the occasional meeting of the four institutions to make music. Vestige may not be the right word for the resultant sound of some 70 trebles plus a similar number of men singing Parry's 'I was glad'. It was a knock-out moment, which had even Ralph Allwood, the conductor for the event, reeling. It was also a pleasure socially, once evensong was over, to meet up with singers from as far away as East Anglia. Those who attended the service will long remember it, and, it has to be said, for some fabulous pianissimos as well as overwhelming fortissimos. It was a wonderfully appropriate way of marking Ralph Allwood's retirement from Eton (but certainly not from the world of music-making). His contribution to church music through the Eton choral courses, and the exceptionally fine choral traditions of Eton College, has arguably been the most significant of any in the training of young singers.