This book is a follow-on to previous works, and includes new photographs and the results of 20 years of new researches. This effort involved extensive research in the archives, site reconnaissance in the field, and interviews with retired employees. This book represents only the tip of the iceberg of the results of those activities. A database of C&P photos was compiled, and new photos were supplied to the WMRHS in Union Bridge. My notes and references will be placed with the Western Maryland Chapter, NRHS. A database of employees of the C&P was compiled. Information previously accepted as correct was cross-checked with other records. New materials in Ross Winans’ handwriting were uncovered, and included. C&P equipment was traced from Alaska to Cuba.