This work investigates the structural and performance requirements for a nativity-themed musical composition intended for diverse ensemble configurations. The author, D. A. Udy, provides a technical overview of the final composition by Ralph Vaughan Williams, outlining the necessary instrumentation and performance options for both concert and dramatic presentations. The text serves as a functional guide for conductors and organizers to assess the feasibility of staging the piece.

Experts and conductors identify this as a practical reference document for managing the logistics of performing Vaughan Williams' final work. It is frequently utilized by music directors to determine the resource requirements for seasonal choral productions.