20 Bulletin of the New York State Museum. 



"WILLIAMS MINE, Putnam Valley, Putnam County. — This 

 opening is two miles north-east of the Croft Mine and in the same 

 valley. It was worked a short time about twenty-five years ago. 



DENNY MINE, Putnam Valley, Putnam County. — The Denny 

 Mine is an old opening on top of the hill, west of Canopus Hollow 

 and at the side of Cold Spring road. It was last worked by the 

 Thomas Iron Company in 1880. 



PRATT MINE, SACKETT MINE, SUNK MINE, Putnam 

 Valley, Putnam County. — These mines are the property of the 

 Philadelphia and Reading Coal and Iron Company. They have lain 

 idle since 1880. The principal mine is known as the Stewart or 

 Sunk, and is opened in the eastern face of a steep ridge, and on the 

 west side of the Canopus Hollow. It is seven miles east of Cold 

 Spring. The Pratt and Sackett are smaller mines, south-west of the 

 Sunk. The CANADA MINE belongs to the same company, and 

 is on the same range, two miles to the north-east and stretching into 

 Phillipstown. 



The mines of* this property produce a non-Bessemer ore. Their 

 distance from railway lines is against their development and working. 

 An extension of the Croft Mine railroad, up the valley, is entirely 

 feasible. 



BLACKBERRY OR GRAND ISLAND MINE, Carmel, Put- 

 nam County. — A bed of iron ore was opened and worked on the 

 westernmost island in Lake Mahopac for a few months in 1879-80. 



TRAVIS' MINE, Carmel, Putnam County.— Near Union Valley, 

 north-east of Croton Falls, there are openings from which a small 

 quantity of ore has been taken. The locality has not developed into 

 a productive mine. 



MAHOPAC MINES, Carmel, Putnam County.— The Mahopac, 

 or German Flats mines, as they are locally known, are opened in the 

 western part of the town of Carmel, and one and one-third miles 

 north of Eed Mills and four miles from Baldwin station, on the New 

 York and Northern railroad. 



Although the existence of ore was known many years ago, and a 

 little work in exploring had been done, there was no regular and 

 thorough prospecting and mining until the autumn of 1879, when 

 the present owners, the Mahopac Iron Ore Company, of New York 



