The sharp separation of the clerks into classes, with distinct examinations for each class, did not arise at once. The first examinations under the original order of 1855 were required only for a "junior situation in any department," and they were not the same in the different departments. They were elementary affairs,[161:1] evidently designed to sift out incompetence rather than to test superiority; for it must be observed that in only a very small proportion of these examinations was there even a limited competition.[161:2] When, however, the Order of 1870 extended the admission examinations to all positions in the service, not specially excepted or filled by promotion, and set up the principle of open competition, it became necessary to distinguish between the higher posts, involving discretionary powers and requiring a liberal education, and the lower ones where the duties are of a clerical kind; to distinguish, in other words, between the administrator and the clerk. Such a distinction was made by the commissioners in their earliest regulations under the Order of 1870,[161:3] the two classes being recruited separately by examinations of different character, the first of which was adapted to university graduates, and the second to young men from commercial life. At the outset the line was drawn somewhat at haphazard without sufficient attention to the real nature of the work to be done, and it was readjusted several times before it assumed its present form.[161:4] [Sidenote: Exceptional Positions.] Aside from the regular grades of clerks recruited by open competition, there are various kinds of inspectors, clerks and other special officials, appointed after open competition, limited competition, pass examination or no examination at all. In fact the departments are full of anomalies, some of them the necessary result of peculiar conditions of service, and others due apparently to no very rational cause. The reader will, no doubt, be sufficiently wearied by a description of the more common methods of examination, without going into the eccentricities of the system. It may be convenient to consider first the open competitions, and then the appointments that are made in other ways. [Sidenote: The First-class Clerkships.]