early documented accounts
One well-documented account of earlier formations, from the highly respected science magazine Nature, describes flattened circles with standing centres of stalks in wheat, a characteristic still often seen today, in Surrey, England in 1880, a good century before crop circles became the publicly-known phenomenon they are today. In the July 29, 1880 issue, a short letter to the editor was published, written by a respected scientist of the time, spectroscopist J. Rand Capron, describing circular flattenings in a wheat field in Surrey, England.
The description given is very similar to many other cases of crop circles of the simpler variety, both current and older, with circular flattened areas, standing centres of stalks and untouched walls of standing crop around the outside perimeters of the circles. This case was first discovered by Peter Van Doorn as a reprint in the January 2000 issue of the Journal of Meteorology. (For anyone who may not have seen this report yet or is interested in a copy, CCCRN has obtained a print copy from the microfilm archives in the Vancouver library. This is the original letter in Nature, not the 2000 reprint. The copy also includes the volume cover page, Volume XXII, May 1880 - October 1880, as there is not a separate copy of the cover available for that specific issue of July 29, 1880. The mentioned sketch was not published with the letter unfortunately).