Live Frog found in Black Diamond Coal Mine (sources)

  • "MISCELLANEOUS," article in the Otago Witness, newspaper of the Otago Region of New Zealand, Issue 1115, 12 April 1873, Page 4
  • "Scientific Notes," article in Appleton's Journal, Vol. IX, No. 208, March 15, 1873 New York City, New York, USA. Pg. 381
  • Stranger Than Science, by Frank Edwards, 1978 Bantam Books [first published 1959 Lyle Stuart, Inc.], pgs. 21-22