Thanks so far for the replies, we're headed in the right direction. The second Lakewood date was news to me, although I knew that Atlanta had several meetings on Independance day throughout the fourties. Some were IMCA, though.
Two winners for one event don't make me terribly happy, but since Cohin's info comes complete with average speed, I tend to believe him on this. I also know that Horn won at least one race, because in 1958 it was remarked that Tony Bettenhausen had been the first National Champion without a race win.
Frank, I do know Gordon White, he's a regular at the Racing History e-group, where I am a (lurking) member. He's doing a fantastic job, preserving all those journals on microfilms, but unless I know specific issues to look for, there's just no use to buy the films, I'm no millionaire!
This is my stand so far on 1946:
May 30, 30th Indianapolis 500, Indianapolis Motor Speedway
1 George Robson, #16, Thorne Engineering Corp., Adams/Sparks, 200 laps, 1000 points
2 Jimmy Jackson, #61, Jimmy Jackson, Miller/Offenhauser, 200 laps, 800 points
3 Ted Horn, #29, Boyle Racing Headquarters, Maserati 8CTF, 200 laps, 700 points
4 Emil Andres, #18, Frank Brisko, Maserati 8CTF, 200 laps, 600 points
5 Joie Chitwood/Sam Hanks, #24, Fred Peters, Wetteroth/Offenhauser, 200 laps, 127.5 (130) points
6 Louis Durant, #33, Milt Marion, Alfa Romeo 308, 200 laps, 400 points
7 Luigi Villoresi, #52, Corvorado Filippini, Maserati 8CL, 200 laps, 300 points
8 Frank Wearne, #7, Ervin Wolfe, Shaw/Offenhauser, 197 laps, flagged, 250 points
9 Bill Sheffler, #39, Bill Sheffler, Bromme/Offenhauser, 139 laps, flagged, 200 points
10 Billy DeVore, #17, William Schoof, Wetteroth/Offenhauser, 167 laps, accident, 150 points
11 Mel Hansen, #41, Ross Page, Kurtis/Duray, 143 laps, engine, 100 points
12 Russ Snowberger/Duke Nalon, #25, R. A. Cott, Maserati 8CTF, 134 laps, differential, 38.75 (39) points
Jun 30, 3rd Langhorne 100, Langhorne Speedway
1 Rex Mays, #1, Bowes Racing Inc., Stevens/Winfield, 100 laps, 200 points
2 George Robson, #16, Shirley (Cliff) Bergere, Wetteroth/Offenhauser, 100 laps, 160 points
3 Ted Horn, #24, Fred Peters, Wetteroth/Offenhauser, 100 laps, 140 points
4 Emil Andres, #44, Emil Andres/Montgomery Ward, Wetteroth/Offenhauser, 91 laps, flagged, 120 points
5 Billy DeVore, #17, William Schoof, Wetteroth/Offenhauser, 88 laps, flagged, 100 points
6 Buddy Rush, #37, Bud Bardowski, ?/Studebaker, 84 laps, flagged, 80 points
7 Walt Brown, #7, Norm Olson, ?/Offenhauser, 78 laps, retired, 60 points
8 Hal Robson, #31, Louis Rassey, Snowberger/Offenhauser, 72 laps, retired, 50 points
9 George Connor, #38, Ed Walsh, Kurtis/Offenhauser, 55 laps, magneto, 40 points
10 Danny Goss, #55, Jack Dixon, Clemons, 44 laps, retired
11 Lee Wallard, #33, Milt Marion, Alfa Romeo 308, 25 laps, retired
12 Mauri Rose, #9, Joe Lencki, Lencki, 22 laps, accident
Sep 2, 1st Atlanta 100, Lakewood Speedway
1 George Connor, #38, Ed Walsh, Kurtis/Offenhauser, 98 laps, 200 points
2 Steve Truchan, #28, Jimmy Chai, ?/Offenhauser, 98 laps, 160 points
3 Emil Andres, #44, Emil Andres/Montgomery Ward, Wetteroth/Offenhauser, 97 laps, flagged, 140 points
4 Bud Bardowski, #37, Bud Bardowski, ?, 96 laps, flagged, 120 points
5 Joe Langley, #55, Jack Dixon, Clemons, 95 laps, flagged, 100 points
6 Ted Horn, #24, Fred Peters, Wetteroth/Offenhauser, 97 laps, retired, 80 points
7 George Robson, #16, Shirley (Cliff) Bergere, Wetteroth/Offenhauser, ? laps, fatal accident, 60 points
8 George Barringer, #7, Ervin Wolfe, Shaw/Offenhauser, ? laps, fatal accident, 50 points
9 Billy DeVore, #17, William Schoof, Wetteroth/Offenhauser, ? laps, accident, 40 points
10 Duke Dinsmore, #3, Norm Olson, ?/Offenhauser, ? laps, retired
11 Rex Mays, #12, Richard Palmer, Stevens/Offenhauser, 23 laps, oil pressure
no more starters
Sep 15, 1st Indianapolis 100, Indiana State Fair Park
1 Rex Mays, #1, Bowes Racing Inc., Stevens/Winfield, 100 laps, 200 points
2 Mauri Rose, #9, Joe Lencki, Lencki, 99 laps, flagged, 160 points
3 Emil Andres, #44, Emil Andres/Montgomery Ward, Wetteroth/Offenhauser, 99 laps, flagged, 140 points
4 Ted Horn, #24, Fred Peters, Wetteroth/Offenhauser, 99 laps, flagged, 120 points
5 Tony Bettenhausen, #67, Bill Corley (?), Wetteroth/Offenhauser (?), 99 laps, flagged, 100 points
6 Floyd Davis, #17, William Schoof, Wetteroth/Offenhauser, 98 laps, flagged, 80 points
7 George Connor, #38, Ed Walsh, Kurtis/Offenhauser, 98 laps, flagged, 60 points
8 Al Miller, #25, R. A. Cott, Maserati 8CTF (?), 98 laps, flagged, 50 points
9 Steve Truchan, #28, Jimmy Chai, ?/Offenhauser, 88 laps, engine, 40 points
10 Spider Webb, #45, Fred Johnston, Adams/Offenhauser, 77 laps, clutch, 30 points
11 Duke Dinsmore, #37, Norm Olson, ?/Offenhauser, 54 laps, oil loss, 20 points
12 Elbert Booker, #31, Louis Rassey, Snowberger/Offenhauser, 11 laps, engine
Sep 22, 3rd Milwaukee 100, Wisconsin State Fair Park, West Allis
1 Rex Mays, #1, Bowes Racing Inc., Stevens/Winfield, 100 laps, 200 points
2 Ted Horn, #24, Fred Peters, Wetteroth/Offenhauser, 100 laps, 160 points
3 Emil Andres, #44, Emil Andres/Montgomery Ward, Wetteroth/Offenhauser, 100 laps, 140 points
4 Duke Dinsmore, #17, William Schoof, Wetteroth/Offenhauser, 100 laps, 120 points
5 Charlie Rogers, #71, Lawrence Jewell, Miller/Hal, 100 laps, 100 points
6 Mauri Rose, #9, Joe Lencki, Lencki, 99 laps, fuel pump, 80 points
7 Elbert Booker, #31, Louis Rassey, Snowberger/Offenhauser, 94 laps, engine, 60 points
8 Spider Webb, #45, Fred Johnston, Adams/Offenhauser, 65 laps, engine, 50 points
9 Tony Bettenhausen, #67, Bill Corley, Wetteroth/Offenhauser (?), 50 laps (?), oil line, 40 points
10 George Connor, #38, Ed Walsh, Kurtis/Offenhauser, 46 laps, axle
11 George Metzler, #55, Jack Dixon, Clemons, 40 laps, accident
12 Bud Bardowski, #87, Bud Bardowski, ?/Offenhauser, 35 laps, spark plugs
Oct 6, 2nd Goshen 100, Goshen Speedway
1 Tony Bettenhausen, #7, Paul Russo, Wetteroth/Offenhauser, 100 laps, 200 points
2 Ted Horn, #24, Fred Peters, Wetteroth/Offenhauser, 99 laps, flagged, 160 points
3 Duke Dinsmore, #17, William Schoof, Wetteroth/Offenhauser, 99 laps, flagged, 140 points
4 Emil Andres, #44, Emil Andres/Montgomery Ward, Wetteroth/Offenhauser, 99 laps, flagged, 120 points
5 Charlie Rogers, #71, Lawrence Jewell, Miller/Hal, 98 laps, flagged, 100 points
6 Eddie Casterline, #37, Norm Olson, ?/Offenhauser, 98 laps, flagged, 80 points
7 Fred Carpenter, #31, Spencer Gardner (?), ?, 70 laps, overheating, 60 points
8 George Metzler, #55, Jack Dixon, Clemons, 59 laps, accident, 50 points
9 George Connor, #38, Ed Walsh, Kurtis/Offenhauser, 55 laps, oil pressure, 40 points
10 Bud Bardowski, #87, Bud Bardowski, ?/Offenhauser, 47 laps, engine
no more starters
Info comes mostly from Phil Harms, plus my own research.
Keep digging!