The custom of betrothal was very general, but it varied in form in different parts of the kingdom. The presentation of an "engagement ring," as in England, is not found among these forms, nor does it appear that the sanction of parents was thought necessary; but after the contract was made it was usual for them to be informed and their sanction sought. Among the upper and middle classes there was usually a betrothal feast, but among the classes living by manual labour this was dispensed with. Dr Rogers says, in his "Social Life in Scotland," that--"In betrothal, the parties usually moistened with the tongue the thumbs of their right hands, and then pressed them together. The violation of a contract so consecrated was considered tantamount to an act of perjury." Another form of betrothal was the clasping of hands across a stream. In this way Burns, the laureate of the Scottish peasantry, and Mary Campbell vowed fidelity. In some counties silver coins were exchanged by plighted lovers, or a worn one was broken between them, each retaining one of the halves. Marriages regarded by the ecclesiastical courts and Kirk Sessions as "regular" have always, from a long period anterior to the Reformation, been preceded by the publication of banns. In 1569 a case came before the General Assembly which shows the successive steps taken at that time before the solemnisation of a marriage. It is recorded that "ane promise of marriage made, before the readers and elders, in ane reformit church, the parties contractit compeirs before the minister and session, and requires their banns to be proclaimit." In 1575 the question came before the General Assembly, whether the form of mutual declaration prior to the publication of banns should be longer continued; and it was ruled that it should be considered sufficient for the names of the parties desiring proclamation of banns to be given to the session clerk. Banns were ordered to be published, as in England, on three successive Sundays; but, after the Reformation, it was ruled that, on payment of a larger fee, one public announcement should be held sufficient, the words "for the first, second, and third time" being used.