All about Tommy and Natalie Mallory, an American couple who have traveled from Morocco to Mexico (but why?) and Maura and Lin Prescott, two students there. Lin worries over Maura and well she might: she's been going with doubtful Luis and when she finds she's the wrong recipient of a hundred thousand dollars, she disappears. Before you can figure out her message—"The Irish seek the true cross"—you'll find yourself in Vera Cruz where the smuggling has more revolutionary implications. . . . Miss Hart writes at about—perhaps just above—the level of Amelia Walden; and if she's not one to avoid a cliche if it presents itself, you'll find the story has full value and goes down as smoothly as tequila with that pinch of salt.