Many master freemasons, who carved freestone or finely grained sandstone and limestone artistically with mallet and chisel, left the country for better wages after their wages were fixed by statute. The curvilinear gothic style of architecture was replaced by the perpendicular style, which was simpler and cheaper to build. Church steeples now had clocks on them with dials and hands to supplement the church bell ringing on the hour. Towns recognized surgery as a livelihood subject to admission and oath to serve the social good. Master surgeons were admitted to practice in 1369 in London in full husting before the mayor and the aldermen and swore to: faithfully serve the people in undertaking their cures, take reasonably from them, faithfully follow their calling, present to the said mayor and aldermen the defaults of others undertaking, so often as should be necessary; to be ready, at all times when they should be warned, to attend the maimed or wounded and others, to give truthful information to the officers of the city as to such maimed, wounded, or others whether they be in peril of death or not, and to faithfully do all other things touching their calling. Some young girls of good families were boarded at nunneries to be taught there. Some upper class widows retired there. Only women were allowed to be present at a birth, at which they spread the knowledge of midwifery. As usual, many women died giving birth. Various ways to prevent pregnancy were tried. It was believed that a baby grew from a seed of the father planted in the woman's body. Infant mortality was especially high in boroughs and burgess family lines usually died out. A three-generation family span was exceptional in the towns, despite family wealth. Children's sweets included gingerbread and peppermint drops. After the plague, gentlemen no longer had their children learn to speak Norman. The grammar schools taught in English instead of Norman. Bishops began to preach in English. Twenty years later, English became the official language of the courts and of Parliament. A will in 1389 in which a wealthy citizen arranges for one son to become a lawyer and the other a merchant: "Will of William de Tonge, citizen of London: One hundred marks [1,333s.] each to my two sons. And I will that my said two sons shall live upon the profits of the money bequeathed to them above until the age of twenty years. And if my said two sons be well learned in grammar and adorned with good manners, which shall be known at the end of twenty years, and the elder son wish to practice common law, and if it is known that he would spend his time well in that faculty, I will that over and above the profit of the said one hundred marks he shall have yearly from my rents for the term of seven years five marks [67s.]. And if he should waste his time aforesaid, or if he should marry foolishly and unsuitably, I will that he receive nothing more of the said five marks.