We live from hand to mouth, most of us, with a small family of immediate desires; we do little else than snatch a morsel to satisfy the hungry brood, rarely thinking of seed-corn or the next year’s crop.
There are no more uses of "hand-to-mouth" in the book.
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She lives hand-to-mouth.
Now you have to understand that twenty pennies might be a good bit of money for some little ragamuffin troupe living hand-to-mouth.