Could it be Merino Sorter? A Merino Sorter sorted merino wool, a fine long stapled wool, suitable for combing.
There were also Sorters who picked over heaps of waste materials and sorted them into small heaps according to kind, colour, grade and condition, they were sometimes specifically designated according to the waste sorted e.g. merino sorter, rag sorter, linen sorter etc. From "A Dictionary of Occupational Terms"
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