In the Rental List for the Coolatin estate, MS 6069 in the NLI, a footnote at the end of the book lists the undertenants of Mary Coates farm on Knocknaboley Wicklow. Andrew Saunders was one of the names on the list. The Coates had a major lease from the estate for at least 70 years which covered much of Knocknaboley townland. Many families worked for the Coates but their names would never appear in the Coolatin records, so it is fortunate to have this record. It shows that many of the future lessees of Knocknaboley were actually undertenants before they were granted leases in the 1805-1809 rewrites of leases. It is not clear how long Andrew had lived on the estate before 1800. By 1803 Mary Coates had died and William Hannan assumed part of her old lease on Knocknaboley. Another NLI manuscript MS 6071 contains a list of the 1803-04 undertenants of William Hannan in which Andrew Saunders is shown to farm about 4 Irish acres on Knocknaboley.