Gradually there grows up an elaborate system of good form, specifically regulating the manner in which this vicarious leisure of the servant class is to be performed.

Any departure from these canons of form is to be depreciated, not so much because it evinces a shortcoming in mechanical efficiency, or even that it shows an absence of the servile attitude and temperament, but because, in the last analysis, it shows the absence of special training.

Special training in personal service costs time and effort, and where it is obviously present in a high degree, it argues that the servant who possesses it, neither is nor has been habitually engaged in any productive occupation.

It is prima facie evidence of a vicarious leisure extending far back in the past.

So that trained service has utility, not only as gratifying the master's instinctive liking for good and skilful workmanship and his propensity for conspicuous dominance over those whose lives are subservient to his own, but it has utility also as putting in evidence a much larger consumption of human service than would be shown by the mere present conspicuous leisure performed by an untrained person.