Sir Kenelm Digby (pictured) was dealt a rough opening hand. His father, Everard, more from friendly commitment than conviction, found himself embroiled in the Gunpowder Plot. He was tried, convicted and hung, drawn and quartered. This was an especially gruesome form of death. When it was described to me, as a child, by my English teacher, it led at least one classmate to actually faint! Kenelm grew up, a recusant Catholic, motivated, so Joe Moshenska argues, to make for himself a life so splendid that the stain would be removed. How he did so is the subject of Moshenska's "A Stain on the Blood: The Remarkable Voyage of Sir Kenelm Digby". It is a well written account that introduces you to a lost figure of seventeenth century English history who, as a person, is admirable. A myriad minded man he was scholarly, adventurous, an accomplished diplomat and, helpfully, for story telling, had a deeply passionate engagement with Venetia, the woman who became his wife; and...