What does Chapter 45 mean by the term 'speech-sacrifice' (Vag-yagna), and what is its purpose?

In Chapter 45, the term 'speech-sacrifice' (Vag-yagna) refers to the creation and offering of the Shri Sai Satcharitra itself. The author humbly presents this work as a sacrificial offering, putting an 'ignorant one' like himself forward to complete the task with the Guru's grace. The purpose of this Vag-yagna, as detailed in Chapter 45, is to create an enduring 'literary form' for Sai Baba now that His physical form has departed. This ensures His remembrance continues and allows devotees to perform a 'supremely holy act' by listening to the stories with a concentrated mind, thereby attaining a unique and indescribable peace.