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Yep, a history of the tool. The file is an object so universal but so little noticed that I'd think a history would be hard to write and in fact the foreword mentions this. This appears to have been something of a promotional item but is pretty detailed with the story running from the Stone Age to the Assyrians to medieval Germany. Much of the modern section covers various uses and types of files, even distinguishing for those of us who didn't know rasps from files.
