| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT COLONEL W.V. BINGHAM REGARDING THANK YOU FOR YOUR LETTER OF APRIL 29TH] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT COLONEL H.J.M. SMITH REGARDING THANK YOU FOR YOUR LETTER] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT COLONEL DAVID E. CAIN REGARDING VISIT TO PRINCETON] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT COLONEL CHARLES B. LYMAN REGARDING THANK YOU FOR YOUR KIND LETTER] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT B.L. GURNETTE REGARDING THANK YOU FOR FINDING OUT ABOUT DE GRASSE] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO LIEUTENANT B.L. GURNETT REGARDING THANK YOU FOR THE COPY OF THE REGISTER] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO GREGORY W. O'KEEFE REGARDING DOCK PASS FOR THE NORTH GERMAN LLOYD LINRE "EUROPA"] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CORPORAL ELDOR T. HUBIN REGARDING PERSONAL UPDATE] [WITH ATTACHMENT] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO COLONEL WILLIS D. CRITTENBERGER REGARDING THANK YOU FOR THE ORGANIZATION-CHART OF THE COMPOSITE REGIMENT] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO COLONEL CHARLES BURNETT REGARDING TRIP TO FORT SAM HOUSTON] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO COLONEL ARTHUR POILLON REGARDING VISIT TO CAMP DIX] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CAPTAIN WILLIAM F. JENNINGS; JOSEPH T. ROBINSON REGARDING BRIEF HISTORY OF THE 4TH CAVALRY] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CAPTAIN WALTER F. JENNINGS REGARDING 4TH CAVALRY TO FUNCTION WIT THE NINTH CORPS AS CORPS RECONNAISSANCE REGIMENT] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CAPTAIN PHILIP E. ENSLOW REGARDING LETTER] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CAPTAIN FRANK HUYLER REGARDING COLONEL STURGILL THINKING OF PUTTING HIS GRAY HORSE AT DISPOSITION] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO CAPTAIN C.P. BIXEL REGARDING THANKS FOR YOUR LETTER] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO BRIGADIER GENERAL CHAS. M. BUNDEL REGARDING LETTER CONCERNING MY COMING DUTY AT FORT LEAVENWORTH] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO BRIGADIER GENERAL CHAS. M. BUNDEL REGARDING LETTER CONCERNING COMING DUTY AT FORT LEAVENWORTH] |
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| [CORRESPONDENCE FROM CAPTAIN WILLIAM S. BIDDLE TO BRIGADIER GENERAL CHAS. ELLIOT WARREN REGARDING LETTER OF MARCH 25TH] |
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| [CORRESPONDENCE FROM CAPTAIN W.F. JENNINGS TO CAPTAIN WILLIAM S. BIDDLE REGARDING LETTER OF FEBRUARY 10TH] |
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