All this points to a fifth desideratum for the descriptive protocol: regularities of behavior associated with the nominally central activity (although not part of the explicit culture pattern) should be included in the protocols of the field worker, since these unwitting regularities often provide basic clues to distinctive functions of the total pattern.  As we shall see, the inclusion of these "unwitting" regularities in the descriptive protocol directs the investigator almost at once to analysis of the pattern in terms of what we have called latent functions (1968, p. 114).