She and her younger sister were supervised and tutored by Mistress Hamblyn, her father's niece, and were educated both in academic studies (reading, writing, arithmetic) and in ‘domestics’ (manners, music, needlework, religion).
In addition, Grace received training in the making and administering of medicinal remedies and treatments.
Auditor, north parts duchy of Lancaster 1589-94 (reversion to fa. I always knew him, John Chamberlain wrote in 1597, to be paucorum hominem; and there must have been few who found Mildmay worth cultivating.
Anthony could not have been much above 18 when he married a co-heir of Lacock, an alliance which, if its material rewards were to accrue only after his father-in-law's death in 1580, and then at the cost of bitter squabbling with his relatives, gave Mildmay a footing in Wiltshire soon to be advanced by the marriage of his sister Martha to the influential William Brouncker of Melksham. Mildmay's brief experience of military service at the time of the Northern Rebellion was followed by his return to the Parliament of 1571 for Newton, perhaps through the influence of the chancellor of the duchy of Lancaster, of which his father was auditor.Its two purposes, the general one of keeping France in the war and the particular one of persuading Henri to recapture Calais, were difficult, perhaps impossible, of achievement, as Mildmay was quick to realise, and the gulf which soon came to separate King and Ambassador was not of either's sole making.Mildmay probably had too much of his father's puritanism ever to condone Henri's calculated conversion, while the King's condemnation of his trafficking with those of the religion made no allowance for the Ambassador's affinity with the Huguenots.She was also a practising Protestant during the nascent years of the Protestant Church of England.In certain respects, Lady Grace Mildmay's upbringing and daily life were unremarkable for an Elizabethan woman of her status, for she had what was considered to be a standard education.