18th Century Pen & Ink Male Nude Drawing - Artist Unknown

Here is another pen and ink drawing in my collection. I found it sequestered in a drawer in the print cabinet. It is signed, but for the life of me I cannot read the signature. It appears to be a quick study of a reclining male nude. Beyond that, I do not have any further information where it originated.
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Caption: Male Nude
Artist: Signature Illegible
Medium: Pen & Ink on paper
Dated: undated, circa 1760