This is information I have found about Charles Heebner:
Mr. Charles Heebner, an importer and dealer in marble at Philadelphia, was active in bringing the Lee marble to the attention of the commission, and in 1852 purchased the farm of William L. Culver, near the village of Lee, made a contract with the Government for furnishing half a million cubic feet for the Capitol enlargement, and in connection with his partners, Messrs. Rice and Baird, opened what has since been known as the Heebner quarry, building a branch railroad from the Housatonic into it, so that the marble could be hoisted from the quarry directly upon the cars. Mr. Heebner was the manager of the quarry and was a man of great energy, strong will and good judgment. The enterprise was a success. Twelve years were allowed in the contract for the delivery of the marble at Washington, and during these years, Mr. Heebner employed about a hundred men. He also purchased, in connection with some parties in New York, a section of the farm of Mr. C. K. Lanphier and the whole of the Van Deusen farm, and opened what has been called the New York quarry. Mr. Heebner lived to fulfill his contract with the Government and at its expiration in 1865, he had delivered at Washington 491,570 cubic feet of marble, receiving therefor $865,043, besides furnishing stone for sundry smaller buildings in New York and Philadelphia. The business brought much money into town and was a great help to the Housatonic road, down which the marble was transported to Bridgeport, and thence shipped to Washington. Mr. Heebner died at Philadelphia in 1867, but the Heebner and New York quarries were soon purchased of his estate by Mr. Frank S. Gross
(Centennial Celebration, History of Lee)
I am still searching for more information and will post anything I find.