Go to this link to see a graph of the occurrence of the word magick between years 1800 and 2008, as collected from the Google Books collection, courtesy of the Google Books Ngram Viewer. I suspect the bump around 1900 is due to Crowley. Links at the bottom of that page show you the individual books the word is found in, which are great for finding gems such as this:
The animal body is a description of Leyden phial, or magick battery, in one part of which there is an excess of electricity and in the other a deficiency. The conducting body communicates the fluid of the part where it is abundant to the part where it is defective; and in this passage of the electricity, the muscular contractions are obtained in the same way as the discharges that are produced by the Leyden phial or magick batteries. // Thomas Green Fessenden, The Modern Philosopher:
Or Terrible Tractoration! in Four Cantos, Most Respectfully Addressed to the Royal College of Physicians, London