Agatha Christie著"Murder on the Orient Express"の
Part 1 The Fact Chapter 8 The Armstrong Kiddnapping Caseで以下のような台詞があります。
"Colonel Armstrong was an English man - a V.C. He was half American, as his mother was a daughter of W.K. (以下略)"
これ台詞の意味をどなたか教えてください