The use of linguistic forms derived from the lexicon denoting sacred entities is often subject to tabooing behaviour. In the 15th and 16th century phrases like by gogges swete body or by cockes bones allowed speakers to address God without really saying the name; cf. Hock (1991: 295). The religious interjections based on the phonetically corrupt gog and cock are evidenced to have gained currency in the 16th century. In the 17th century all interjections based on religious appellations ceased to appear on stage in accordance with the regulations of the Act to Rest