In 1950, Cartland was accused of plagiarism by author Georgette Heyer, after a reader drew attention to the apparent borrowing of Heyer's character names, character traits, dialogue and plot points in Cartland's early historical romances. In particular, "A Hazard of Hearts" (1949), which replicated characters (including names) from Heyer's "Friday's Child" (1944) and "The Knave of Hearts" (1950) which, Heyer alleged, "the conception ... , the principal characters, and many of the incidents, derive directly from an early book of my own, entitled "These Old Shades", first published in 1926. ... For minor situations and other characters she has drawn upon four of my other novels." Heyer completed a detailed analysis of the alleged plagiarisms for her solicitors, but the case never came to court.