With the wide variety of child performers required in the opera, and in light of how it was cast and performed at its premiere, Britten detailed some of its specific requirements for performance in the vocal and study scores published by Boosey & Hawkes. The opera is intended for a large hall or church, not a theatre. The action should take place on raised rostra, though not on a formal stage set apart from the audience, and the orchestra should be placed in full sight, with the conductor in a position to conduct both the orchestra and, when performing the hymns, the congregation. Noye and Mrs Noye are sung by "accomplished singer-actors", and the Voice of God, although not necessarily a professional actor, should have "a rich speaking voice, with a simple and sincere delivery, without being at all 'stagey. The young amateurs playing the parts of Noye's children should be between 11 and 15 years old, with "well-trained voices and lively personalities"; Jaffet, the eldest, could have a broken voice. Mrs Noye's Gossips should be older girls with strong voices and considerable acting ability. The children playing the animals should vary in size, and range in age from seven to eighteen. The older age groups, with perhaps some broken voices, should represent the larger animals (lions, leopards, horses, camels etc.), while the younger play rats, mice and birds. There is a dance or ballet involving two child performers playing the roles of the raven and the dove.