The women's outfits may be decorated with simple blockprint patterns on the hems. There is also some local production of knit jerseys by Tongans operating imported sergers. They produce on speculation and sell at the Nukualofa market. Women who attend the Wesleyan Methodist girls' school, Queen Sālote College, are taught several Western handicrafts, such as embroidery and crochet. They learn to make embroidered pillowcases and bed coverings or crocheted lace tablecloths, bedcovers, and lace trim. However, Western-style handicrafts such as these have not become widely popular outside the school setting. They require expensive imported materials that can only be purchased in major towns. Village women are much more likely to turn their efforts to weaving mats or beating barkcloth, which can be done with free local material. A few Tongan village churches are decorated with freehand murals or decorations done in house paint, which may mix crosses, flowers, and traditional barkcloth motifs. The practice is uncommon and the execution is always crude. In the 1970s there was a small factory near Nukualofa that made simple jewelry from coral and tortoise-shell for sale to Western tourists. It is not clear if this factory is still operating. The government may have protected sea-turtles and corals (as has been done in most other countries) and ended this line of manufacture. Scholars know relatively little about the music of Tonga as it existed before Tonga was encountered by European explorers. Early visitors, such as Captain Cook and the invaluable William Mariner, note only the singing and drumming during traditional dance performances. Scholars can assume the existence of the lali or slit-gong, and the nose flute, as these survived to later times. Traditional songs, passed down over the generations, are still sung at chiefly ceremonies. Some ancient dances are still performed, such as ula, otuhaka and meetuupaki. Methodists were known for their extensive use of hymns in their emotional services. True to their tradition, the early missionaries introduced hymn-singing to their congregations. These early hymns—still sung today in some of the Methodist sects, such as the Free Church of Tonga and the Church of Tonga - have Tongan tunes and simple, short Tongan lyrics. There is a special Tongan music notation for these, and other, musics. Traditional music is preserved in the set pieces performed at royal and noble weddings and funerals, and in the song sung during the traditional ceremony of apology, the lou-ifi.