The Celts and the early Anglo-Saxons used an alphabet of runes, angular characters originally developed for scratching onto wood or stone. The first known written English sentence, which reads "This she-wolf is a reward to my kinsman", is an Anglo-Saxon runic inscription on a gold medallion found in Suffolk, and has been dated to about 450-480 AD. The early Christian missionaries introduced the more rounded Roman alphabet (much as we use today), which was easier to read and more suited for writing on vellum or parchment. The Anglo-Saxons quite rapidly adopted the new Roman alphabet, but with the addition of letters such as wynn ("wynn"), � (“thorn”), ๐ (“edh” or “eth”) and 3 (“yogh”) from the old runic alphabet for certain sounds not used in Latin. wynn later became "uu" and, still later, "w"; � and ๐ were used more or less interchangeably to represent the sounds now spelled with “th”; and 3 was used for "y", "j" or "g" sounds. In addition, the diphthong ๆ (“ash”) was also used; "v" was usually written with an "f"; and the letters "q", "x" and "z" were rarely used at all.