It was sorrowful to think how many days, and weeks, and months, and years of toil had been wasted on these musty papers, which were now only an encumbrance on earth, and were hidden away in this forgotten corner, never more to be glanced at by human eyes.
There are no more uses of "encumber" in the book.
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Digital distribution is encumbered by old copyright law.
Players complain they are encumbered by the new protective padding.