She had the good sense to study English, and soon became a perfect mistress of the language.
A..D. 1675. Mary Beatrice had a little daughter born about a year after her marriage. This was a great pleasure, but it was soon marred by the duke's refusal to have the baby baptized a Catholic. He did not object himself, but explained to his wife that their children belonged to the nation and would be taken from them if not brought up according to the established church, adding that is was besides the king's pleasure, to which they must submit. The youthful mother appeared to yield, but sent for her confessor, Father Gallis, and had the child baptized on her own bed according to the rites of the church of Rome.
When the king came a day or two later to make arrangements with her and the duke for the christening of their child, Mary Beatrice told him that "her daughter was already baptized." Without paying the slightest attention to this assertion, his majesty ordered the little princess to be borne to the royal chapel, where she was christened by a Protestant bishop, her half-sisters, Mary and Anne, acting as sponsors. The baby was named Catharine Laura after the queen and the Duchess of Modena, and the Catholic baptism was kept a profound secret, though it must have been a subject of annoyance to the king.
A fortnight later some very severe laws were made against the Catholics. One of them forbade any British subject from officiating as a Romish priest, either in the queen's chapel or elsewhere; another prohibited any adherent of the Catholic, church to set foot in Whitehall or St. James's Palace, the penalty for such an offence being imprisonment. This law of course kept the Duchess of York and the Catholic ladies of her household from the king's palace, but the young mother was so wrapt up in her baby that she was indifferent to almost anything besides. She was happy with her husband also, and lived on terms of close friendship with her step-daughters, who never accused her of the slightest unkindness to them, even in later years, when they would have been pleased to bring any unfavorable accusation against her. But the young mother was soon to be deprived of the infant she loved so fondly, for it died of a convulsion before it was ten months old.
This was, of course, a great sorrow to Mary Beatrice, but she was not permitted to indulge it very long, for before the close of the year she had to attend a feast given by the lord mayor, and a ball at her own palace.
A.D. 1676. Another princess was born the next year, and this time there was no secret baptism. That ceremony was performed by Dr. North, Master of Trinity College, and the child was named Isabella. She lived to the age of five years.
A.D. 1677 The following year the marriage between the Princess Mary and the Prince of Orange was solemnized; and it was this union that proved so disastrous to the fortunes of the Duchess of York, her husband, her children.
There was much rejoicing in the household of the Duke when a little prince made his appearance. He was christened with great pomp by the Bishop of Durham, and no less a person than the king himself, assisted by the Prince of Orange, acted as sponsor. Charles bestowed his own name on his nephew, and created him Duke of Cambridge. The little fellow died the following month, and was interred, as his sister had been, in the vault of Mary Queen of Scots, at Westminster Abbey.
The duke grieved more for the death of this boy than he had for any of his children. The Prince of Orange wrote a letter of condolence; but, as he was then plotting against his royal father-in-law, and as the death of the little prince opened the way to the throne for his wife, it is not probable that he was sincere in his expressions of sympathy. But Mary Beatrice was ignorant of this, and when she heard that the Princess of Orange was ill she planned a visit to her, which, after obtaining the king's consent, she undertook, in company with Princess Anne and her lord chamberlain, the Earl of Ossory. As it was her desire to ascertain the true state of Princess Mary's health, and to afford her comfort, the duchess travelled incognito, and sent a man on before to hire for her a small house not far from the palace. This was done to secure free intercourse among the three ladies without any of the formality required by court etiquette.
A.D. 1678. Although the visit was a flying one, the duchess found a storm gathering around her husband on her return which soon compelled him to give up his seat among the state councillors. His friends advised him to retire to the continent with his family; but his proud spirit revolted from any move that would have the appearance of guilt or cowardice. The king urged him to baffle his enemies by returning to the church of England, but he refused to act in opposition to his conscience. Then for the sake of peace, which the "merry monarch" would have purchased at any cost, Charles advised his brother to go abroad before the next session of parliament. James consented, providing the king would command it in writing, but he scorned the idea of running away. The order was given in the form of an affectionate letter, and on the fourth of March the Duke and Duchess of York embarked for Holland. They were not permitted to take their little daughter Isabella to share their exile, which was a great deprivation to both parents.