Now, can we sub-classify within this vast class of service-sellers, so as to help us understand better the class as a whole, and so especially as to help us understand better the Law of Wages within the entire class? We have just criticised Walker in a friendly spirit for attempting to draw lines of demarcation within this wide field: can we draw any useful ones ourselves less open to criticism than his, and such as rest back upon fair differences in nature and form? Walker makes his distinctions turn on certain peculiarities in the return-services: can we make ours turn better and clearer on certain peculiarities in the services themselves? We can at least try. Hard and fast lines cannot be drawn here, we admit. The exterior lines around Commodities and around Services and around Credits are each sharp and firm; and so is the deep-fixed circle that includes all three of these alike as Valuables; but _within_ the smaller circles the lines of needful division are somewhat more shadowy, though we leave with confidence to competent Economists the triple lines but just now drawn within the sphere of material Commodities. A rude classification among "Laborers," then, yet one useful and indeed indispensable, may be made into (1) Common Laborers, (2) Skilled Laborers, and (3) Professional Laborers. Common Laborers are those, whose services may be acceptably rendered by an ordinarily competent person after a little patient practice and instruction, without anything corresponding to an _apprenticeship_ as a preliminary to their selling their service. Farm hands, teamsters, porters, waiters, miners, 'longshoremen, railroad laborers, and many more belong to this first class. Owing to the ease with which this class can be recruited at any time from growing boys and emigrating foreigners and from those who may have essayed the class above and fallen back, the Supply here is kept constantly large relatively to the Demand for such services, and consequently Wages are always the lowest and steadiest in this lowest class of Laborers.