| Date |
Title |
Original Text |
Revised Text |
| 1927 |
1959 |
The Tower Treasure |
| 1927 |
1959 |
The House on the Cliff |
| 1927 |
1962 |
The Secret of the Old Mill |
| 1928 |
1962 |
The Missing Chums |
| 1928 |
1963 |
Hunting for Hidden Gold |
| 1928 |
1964 |
The Shore Road Mystery |
| 1929 |
1964 |
The Secret of the Caves |
| 1929 |
1966 |
The Mystery of Cabin Island |
| 1930 |
1965 |
The Great Airport Mystery |
| 1931 |
1967 |
What Happened at Midnight |
| 1932 |
1962 |
While the Clock Ticked |
1933 |
1965 |
Footprints Under the Window |
| 1934 |
1967 |
The Mark on the Door |
| 1935 |
1961 |
The Hidden Harbor Mystery |
| 1936 |
1968 |
The Sinister Signpost |
| 1937 |
1965 |
A Figure in Hiding |
| 1938 |
1966 |
The Secret Warning |
| 1939 |
1969 |
The Twisted Claw |
| 1940 |
1964 |
The Disappearing Floor |
| 1941 |
1970 |
The Mystery of the Flying Express |
| 1942 |
1970 |
The Clue of the Broken Blade |
1943 |
1971 |
The Flickering Torch Mystery |
| 1944 |
1970> |
The Melted Coins |
| 1945 |
1966 |
The Short-Wave Mystery |
1946 |
1969 |
The Secret Panel |
| 1947 |
1970 |
The Phantom Freighter |
| 1948 |
1966 |
The Secret of Skull Mountain |
| 1949 |
1970 |
The Sign of the Crooked Arrow |
| 1950 |
1968 |
The Secret of the Lost Tunnel |
| 1951 |
1968 |
The Wailing Siren Mystery |
| 1952 |
1969 |
The Secret of Wildcat Swamp |
| 1953 |
1969 |
The Crisscross Shadow |
| 1953 |
1971 |
The Yellow Feather Mystery |
| 1954 |
1971 |
The Hooded Hawk Mystery |
| 1955 |
1972 |
The Clue in the Embers |
| 1956 |
1972 |
The Secret of Pirates Hill |
| 1957 |
1966 |
The Ghost at Skeleton Rock |
| 1959 |
1973 |
The Mystery at Devil's Paw |