Captain Jack Sparrow Wins The Gold

Slip of paper, one side has "Robert Armstrong - Thursday" written on, with a bit of text cut off, the other side has this strange sentence:

The pirates frighten the farmers because they have javelins.

Found in "Gus The Great" by Thomas W. Duncan. Published by Lippincott, 1947.

My best guess? I think it might have been a writing exercise for school, either spelling or handwriting.

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