Could you detail the lineage of Shri Saraswati Gangadhar as it relates to Shri Narsimha Saraswati Maharaj?

The Preface in Chapter 0 provides specific information on this lineage. It states that Shri Saraswati Gangadhar's surname was Sakhare. An ancestor in this family, Shri Sayandev, received the grace and a special boon from Shri Narsimha Saraswati Maharaj, who promised, 'My constant service will be performed by your descendants.' This established a sacred duty within the family. The text then clarifies that Shri Saraswati Gangadhar, the author of the famed Guru biography, is the fifth descendant in this blessed lineage that began with Shri Sayandev's devotion.