one at a time

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Related to one at a time: One Step at a Time
ThesaurusAntonymsRelated WordsSynonymsLegend: at a time - in single file; "the prisoners came out one by one"
References in classic literature ?
At this they clapped their hands, and she escorted them up to the Baby Walk and back again, one at a time, putting an arm or a finger round the very frail, setting their leg right when it got too ridiculous, and treating the foreign ones quite as courteously as the English, though she could not understand a word they said.
It must not be supposed that John observed these several characteristics by other than very slow degrees, or that he took in more than half a one at a time, or that he even made up his mind upon that, without a great deal of very serious consideration.
We have but to run under the hammer, one at a time, when it is lifted, and pass to the other side before it falls again.