We're used to seeing high resolution images of the moon; modern telescopes and cameras on lunar orbiters have given us some spectacularly detailed maps that early 20th century astronomers likely never imagined. In lieu of images, these astronomers hand-drew maps based on what they could see with the naked eye through a telescope (on the rare occasion astronomers could use a photographic plate to image an object).
That's what Walter Goodacre, former president of the Lunar section of the British Astronomical Association, did. He drew an incredibly detailed map of the moon 5.8 feet across, the smallest features on which are a few miles across. The map was subsequently published in book form in 1910 and eventually ended up in the hands of the University of London Observatory, and UCL has released it digitally, both in plates -- the one here features Apollo 11's landing site, the Sea of Tranquility or Mare Tranquilitatis -- and as a single, explorable map. Browse a high-resolution version.