Named as a beneficiary in her father's Will (1315)
In 1366, Maud had a licence to have an oratory in her house in St. Dunstan's in the East, London. In 1368 she had a grant for life of a 100 marks annually for long service to the King, Queen Philipp, and Isabel, the King's daughter. 2
The Will of Dame Maud de Say, written 30 Oct 
Dame Maud, which was late the wife of Sir Geoffrey Say, at Bermondsey, Tuesday next after the Feast of the Apostles Simon and Jude, 1369*. My body to be buried in the Church of the Friars Preachers of London, near Edmund† my loving husband; to the Friars there x pounds, and I desire that no feast be made on my funeral day, but that immediately after my decease my corpse shall be carried to burial, covered only with a linen cloth, having a red cross thereon, with two tapers, one at the head and another at my feet, and I charge my son, William de Say, that he do nothing contrary thereto; to John, my son, XLl.; to John de Harleston my French and Latin books; to every esquire of my retinue; to William de Say, my son. 3
* According to the transcription in Testamenta Vetusta, Maud wrote her Will on 30 Oct 1369. This is incorrect (perhaps a transcription error), as the writ for Maud's Inquisition Post Mortem (see below) was issued on 3 August in 43 Edw. III. , in which it states that she died on 28 July last. Presumably Maud wrote her will in the preceding year — in 1368.
† Maud's second husband, whose surname does not appear in her Will.
Inquisition Post Mortem
413. Maud late the wife of Geoffrey de Say.
Writ, 3 August, 43 Edward III. 
Kent. Inq. (indented) taken at Rochester, 12 August, 43 Edward III.
Berlyng and Burgham. The manors, held in dower after the death of Geoffrey her husband, the reversion belonging to William de Say, son and heir of Geoffrey. The manors are held of the king by knight's service, as of the crown.
She died on 28 July last. William de Say, of full age, son of Geoffrey, is the next heir of Geoffrey and Maud.
Sussex. Inq. (indented) taken at Lewes, 20 August, 43 Edward III.
Hammes. The manor, which she and Geoffrey held in tail male, with remainder to the right heirs of Geoffrey, by gift and grant of Thomas de Hethe. The manor is held of the earl of Arundel by knight's service, as of his castle of Lewes, and the reversion belongs to William de Say, son of Geoffrey and Maud.
Bocstead. The manor, which she held jointly with Geoffrey her husband and William her son by gift and grant of Richard de Chuderlegh, parson of the church of Marmehull, and John Cramphorne to the said Geoffrey, William and Maud and the heirs of the bodies of Geoffrey and Maud, with the remainder after the death of William to the right heirs of Geoffrey, as appears by a charter shewn to the jurors. The manor is held of John Waleys, knight, by service of rendering 12d. yearly at his manor of Glynde.
Date of death and heir as above.
C. Edw. III. File 213. (9.)
E. Enrolments &c. of Inq. No. 145 (8—10.) 4