"In reading it I had several splendid shudders. . . . It is a piece of living literature, not merely an evening's entertainment." - E. B. Osborn, Morning Post
"A bang-up ghost-murder-detective story with a background of bleak Northumberland moors, an old house full of haunts, and] a Roman Centurion who appears . . . with death in his wake." - Scribner's Magazine
"A well nigh perfect admixture of eerie horror, romance and good detecting." - Saturday Review
"Truly a little masterpiece of a book. Reminiscent of Christie at the height of her powers in its...