Titles in italics are those given by Cox (see above).The Mystery of the Sealed Box
June 17 - August 10, 1940
Reprinted in the March '41 issue of "Shadow Comics"
and in the July/August '88 issues of "Crime Classics" #1 & #2
as "The Riddle of the Sealed Box"
The Shadow in His Sanctum
aka: The Mystery of the Sleeping Gas
August 12 - September 21, 1940
This is the online strip found at The Shadow Magazine website mentioned above.
Reprinted in the August/September '88 issues of "Crime Classics" #2 & #3
The Shadow versus Hoang Hu
September 23 - November 2, 1940
Reprinted in the May '41 issue of "Shadow Comics"
and in the September '88 & January '89 issues of "Crime Classics" #3 & #4
The Shadow on Shark Island
November 4, 1940 - January 25, 1941
Reprinted in the Sept. '41 issue of "Shadow Comics"
The Shadow versus The Bund
January 27 - April 19, 1941
First half of storyline reprinted in the Nov. '41 issue of "Shadow Comics"
Second half reprinted in the Mar. '42 issue of "Shadow Comics"
The Shadow versus Shiwan Khan
April 21 - July 26, 1941
Reprinted in the May '42 issue of "Shadow Comics"
The Shadow and the Darvin Fortune
July 28 - October 11, 1941
Reprinted in the July '42 issue of "Shadow Comics"
The Shadow and the Adele Varne Mystery
October 13 - November 22, 1941
The Shadow and Professor Scorpio
November 24 - December 13, 1941
Reprinted in the July '42 issue of "Shadow Comics"
The Shadow and the Grey Ghost
December 15, 1941 - January 10, 1942
Reprinted in the Sept. '42 issue of "Shadow Comics"
The Shadow and the Star of Delhi
January 12 - January 31, 1942
Storyline suggested by story "The Star of Delhi" that appeared in the July 1, '41 issue of The Shadow magazine
The Shadow and the Earthquake Machines
February 2 - March 28, 1942
The Shadow and the Return of Althor
March 30 - May 23, 1942
Semi-sequel to the above strip
Re-drawn for the May '43 issue of "Shadow Comics"
The Shadow and the Cliff Castle Mystery
May 25 - June 13, 1942
This is the last newspaper comic strip adventure and the storyline was never completed