| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING SOFIA BULGARIA] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING SO DEAD HERE] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING SHORT UPDATE] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING RETURN FROM SOFIA] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING PUTTERING AROUND ALL MORNING] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING PLAYED A GAME OF GOLF] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING OLIN] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING NOTHING TO WRITE] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING NO NEWS] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING NEW YEAR'S DAY] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING NEW YEAR'S DAY] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING MOST INTERESTING PERIOD] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING MISS GUNTHER] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING MARY'S LETTER] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING MARY'S CHRISTMAS LETTER] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING MARY BACK IN HOUSTON] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING LONG MOTOR TRIP] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING LETTER] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING LETTERS] |
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| [CORRESPONDENCE FROM WILLIAM A. CASTLE TO FAMILY REGARDING LETTER FROM MOODY] |
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