The Mystery at the Moss-Covered Mansion

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The Mystery of the Moss-Covered Mansion
Original edition cover
Author Carolyn Keene
Cover artist Russell H. Tandy
Language English
Series Nancy Drew Mystery Stories
Publisher Grosset & Dunlap
Publication date
1941, 1971
ISBN 0-448-09518-1
OCLC 162578
LC Class PZ7 .K23 Nan no. 18 1971
Preceded by The Mystery of the Brass Bound Trunk
Followed by The Quest of the Missing Map

The Mystery at the Moss-Covered Mansion is the eighteenth volume in the Nancy Drew Mystery Stories series published by Grossett & Dunlap, and was first published in 1941. The original text was written by ghostwriter Mildred Wirt Benson, based upon a plot outline from Stratemeyer Syndicate co-owner Harriet Stratemeyer Adams. The book's title was changed to Mystery of the Moss-Covered Mansion when it was revised in 1971, because the story is completely different and not much of the investigation takes place at the title location. In the original, many plots and much investigation all tie back to the same house deep in the forest, while Nancy helps her father locate an heiress, expose an impostor, investigate a murder, and look into strange screams at the mansion; none of the action in the original story took place in River Heights.

Plot summary - 1941 edition[edit]

Nancy's father Carson Drew enlists her help in tracking down a missing heiress, and Nancy, Bess and George stumble upon a mysterious moss-covered mansion. They later hear that someone was murdered near the mansion, and upon investigating they hear strange noises emanating from within. The story includes a great deal of action; aside from the aforementioned missing heiress and murder, there are gypsies, a needy elderly lady, a reclusive artist, an airplane accident, and a forest fire.

1971 revision[edit]

Now retitled Mystery of the Moss-Covered Mansion, a friend of Nancy's father has been arrested and charged with sending a truck loaded with explosive oranges into the Space Center complex at Cape Kennedy. Knowing that he could not possibly be guilty of sabotage, Nancy and her father rush to the defense of the accused man. During the Drews' investigation, Nancy becomes suspicious of an old, spooky mansion. Behind a high mesh enclosure, wild African animals roam about the extensive grounds. Nancy discovers that something besides the training of wild animals is going on at the mysterious moss-covered mansion estate.

Adult critics among collectors' groups frequently comment on strange elements of the revised story, such as the explosive oranges, and a spy-thriller climax with Ned and Nancy trapped in the house, nearly dying before rescue.


The original dust jacket was painted by Russell H. Tandy, and depicts Nancy, Bess, and George digging for buried money on the grounds of the title location. Tandy also illustrated a frontispiece; this volume is the first in the series to have only one illustration on plain paper; previously, glossy, highly detailed art was used. The cover, but not the interior illustration, was updated to the same scene, set in the 1960s, with Nancy, Bess and George, by Rudy Nappi. Nappi also illustrated the new volume's location with Nancy in the foreground stalked by a panther. An uncredited artist provided five internal line drawings and a frontispiece for the revised text.