Many of the tattoo motifs were passed down through the family - from mother to daughter, and sometimes from father to son. Unfortunately, ethnographic information on most tattoo motifs has been lost - modernity and missionization are largely to blame. For example, tattoos related to the headhunt have been largely forgotten, since killing was outlawed in 1888 when Great Britain annexed Papua. Tattoos associated with the Hula and Motu trading voyages (lakatois) are also no longer seen; motorboats have replaced the traditional sailing vessels and these once formidable expeditions are no longer dangerous. Moreover, missionaries began discouraging initiation ceremonies in the early 20th century, and today tattoos are no longer needed for marriage. Thus, the meaning of Papuan tattoos is fading and gradually being forgotten.