With Harvey Comics, Jack worked on the Pirana and Bee-Man. Simple comics, but fun and entertaining.
Jack's stint with Gold Key and Dell included Tiger Girl (co-created with Jerry Siegel,) Mission Impossible, Girl from U.N.C.L.E., T.H.E. Cat, Valley of the Gwangi, Dirty Dozen, Around the World Under the Sea, Jet Dream (in the Man from U.N.C.L.E. comic book.) Turok and the Outer Limits. This is where I am mainly familiar with him. He did a lot of movie and TV tie-ins, which wasn't as popular then.
When working at Marvel, he worked briefly on Captain America and the X-Men.
Unfortunately, I don't know anything personally about John "Jack" Sparling other than he was Canadian. He left a terrific body of work and will be well remembered for it.
Thank you for your time today.