"a theodolite used by Swedenborg"

 Emanuel Swedenborg (1688 - 1772), was a Swedish scientist, philosopher, theologian, and Christian mystic. In 1741 he had a 'spiritual awakening' and claimed that he had been divinely appointed to write a doctrine to reform Christianity.He claimed that he could freely visit heaven and hell, and he claimed to have talked with angels and demons, as well as spirits from Jupiter, Mars, Mercury, Saturn, Venus, and the moon. After this awakening he wrote and published 18 theological works, including his most famous: Heaven and Hell.