A.D. 1821, June 26.Bog of Kilmaleady, near Clara, King's Co. (Offaly)
The excellent report on the outbreak of this bog, communicated to the Royal Dublin Society by Sir Richard Griffith, may with advantage be consulted by those who are interested in the subject. It will be found in the Journal of the Royal Dublin Society, vol. I., pp. 14I-144 and map, 1858.

Sir William. Wilde gives the following additional particulars taken from the daily press of the time :~
At 7 p.m:, of the evening of the 26th June, the south front of the bog of Ballykillion, or Kilmalady, gave way to a depth of 25 feet, and with a tremendous noise, commenced to move down the valley at the rate of about 2 yards an hour, with a front 200 yards wide, and about 8 feet deep. It continued to move for more than a month,
"About the same time the Ferret bog, about 16 miles north-east of Kilmalady, was strongly agitated, boiling up to a great height."

Ref: Census of Ireland for the year 1851, part v., vol., I, 1856, pp. 189, 190

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