[2] Keeley-Frontier Mine is considered to have produced some of the finest silver wire specimens in Canada.

[3] Robert Jowsey, Charles Keeley, and John Woods discovered silver after they "lit a fire to thaw out the ground," according to Barnes.

[4] The discovery in the Fall of 1907, involved the finding of a smaltite vein 2-6 inches wide containing 11,000 ounces of "wire silver" per ton.

Newburger's death in 1914 put a stop to further development until 1920 when the Mining Corporation of Canada, Limited, acquired an option with a final purchase in 1921.

Most of the silver production occurs in the 300 feet of metavolcanics overlying the Nipissing sills.