[1] Difenderfer practiced this profession for fourteen years in Lewisburg and Pottsville, Pennsylvania.

He returned to the United States in August 1900, where he engaged in the wholesale lumber business and as a contractor at Jenkintown, Pennsylvania.

[4][5] Difenderfer brought an investigation to the house committee on expenditures in the United States Department of War related to the government showing favoritism in awarding shoe contracts.

[6] in 1912, Difenderfer asked that Secretary Charles Nagel of the United States Department of Commerce and Labor investigate high coal prices.

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