The early references point to the representation of single plays or small groups of connected scenes; and such isolated pieces survive as long as there are Miracles: Hull, for instance, specialized on a play of Noah's Ship. But now we have to record the appearance of series or cycles of plays, covering in chronological order the whole span of sacred history. Complete cycles were framed on the Continent as early as the end of the thirteenth century. In England they are represented by the York, Towneley (Wakefield), and Chester plays, and the so-called _Ludus Coventriae_.[15] There are also records or fragments of cycles from Beverley, Coventry, Newcastle-upon-Tyne, and Norwich. The presentation of the cycle sometimes occupied a day (York), sometimes two or three successive days (Chester), and sometimes a part was carried over to the next year's festival (_Ludus Coventriae_). [Foot-note 15: These are not the Coventry plays, of which only two survive, but a cycle of plays torn from their local connexions (ed. J. O. Halliwell, Shakespeare Society, 1841). The title is due to a seventeenth-century librarian, who possibly had heard of no Miracle cycle but the famous one at Coventry.] The production of a long series of scenes in the open requires fine weather, and once the close connexion with the church services had been broken, there was a tendency to throw forward the presentation into May or June. The Chester plays were given in Whitsun-week—at least in later times. But normally the day chosen in fourteenth-century England was the Feast of Corpus Christi (the first Thursday after Trinity Sunday), which was made universal throughout the Church in 1311. So the Miracles get the generic name of 'Corpus Christi Plays'. The feature of the Corpus Christi festival was its procession. As a result either of inclusion in this procession or of imitation, the cycles came to be played processionally: each play had its stage on wheels which halted at fixed stations in the streets, and at each station the play was reenacted. This was the usage at York, Wakefield, Chester, Coventry, and Beverley. The older practice of presentation on fixed stages was followed in the _Ludus Coventriae_.