On-sale date from datestamp on cover at comicbookplus.com.
Jim Vadeboncoeur Jr. credits this to something like "C. Tumsey" on his index card but his writing is hard to read and doesn't appear to match up with anyone at Jerry Bails' Who's Who.
Bottom of second page has ad for other Youthful comics.
Jerry Bails' Who's Who mentions that "Howard James" may have been a pen name for Ernie Hart at Marvel in 1942. Since this is 10 years later, there may be no connection to that pen name.
Jim Vadeboncoeur Jr.'s index card includes the following notes: "Ala Jourdain-Lavery Telltale Heart" and "Sneaks - GH VOS".