Released September 4, 1921
Lois Weber Productions
F. B. Warren Corp.
re-released in 1924 with the title "What Happened Next Door"

"The Blot" is an extant
This film is preserved at the Film Study Center of the Modern Museum Of Art (MOMA).  This film is readily available on DVD by Milestone (2003). 

Dates Issued
1921
25/08/1921 
Physical Description
7 reels; 7,118 ft. 
Notes
Written and Directed by Lois Weber
Star: Philip Hubbard (Professor Griggs)
Archive: Library of Congress (Washington) [Usw], Museum Of Modern Art
(New York) [Usm], UCLA Film And Television Archive (Los Angeles) [Usl],
BFI/National Film And Television Archive (London) [Gbb]
Copyright claimant: Lois Weber Productions
Registration number: Lp16892
Gauge: 35mm domestic release version
Holdings: U.S. Archive
Completeness: complete
Format: 35 mm: Usw 16 mm: Usw, Usl 1/2+ Video: Usw, Usl Format
Unspecified: Gbb
Note: 35 mm Nitrate Negative: Usw 35 mm Nitrate Positive: Usw 35 mm
Acetate Master Positive: Usw 35 mm Acetate Dupe Negative: Usw
Record No.: 4112

April 26th and 27th 2019 in Downs, Kansas

The opening scene from "The Blot" on YouTube:

Another scene from the film posted on YouTube:

Visit Cawker City, Kansas...

...conveniently located halfway
between somewhere and nowhere!