This was going to the fountain head at once, not applying to the understrappers.
Goldsmith.
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Having a contempt for curates, whom he always called understrappers, he was resolved to be buried by a beneficed clergyman.
George Eliot. Middlemarch
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Curious to know upon what subjects the several talents of my fellow-guests were employed, I applied to my communicative friend Dick Ivy, who gave me to understand, that most of them were, or had been, understrappers, or journeymen, to more creditable authors, for whom they translated, collated, and compiled,
Tobias Smollett. The Expedition of Humphry Clinker (1771)