The issue of Marty Barry's position in 1934 has been raised during Round 2, and this thread seems like the best place to stash the research for future use.
Here is how the Bruins' lines broke down in 1933-34:
* I can only assume that the wings were listed in a consistent LW/RW format, since they are each listed simply as "wing" in the summaries.
11-9-33
Gracie-Barry-Clapper
vs
TOR Boll-Primeau-Conacher
11-11-33
Gracie-Barry-Clapper
vs
MTM Trottier-Smith-Ward
11-14-33
Gracie-Barry-Clapper
vs
DET Emms-Goodfellow-Carson
11-18-33
Gracie-Barry-Clapper
vs
MTL Gagnon-Morenz-Joliat
11-21-33
Gracie-Barry-Clapper
vs
CHI Thompson-Gottselig-Couture
11-23-33
Gracie-Barry-Clapper
vs
DET Emms-Goodfellow-Carson
11-26-33
Gracie-Barry-Clapper
vs
CHI Thompson-Gottselig-Couture
11-28-33
Gracie-Barry-Clapper
vs.
OTT Shannon-Voss-Finnigan
11-30-33
Gracie-Barry-Clapper
vs
OTT Shannon-Voss-Finnigan
12-02-33
Gracie-Barry-Clapper
vs
NYR Cook-Boucher-Cook
12-05-33
Gracie-Barry-Clapper
vs
MTL Gagnon-Morenz-Joliat
12-09-33
* Starting line was Gracie-Beattie-Lamb, but the following appear in the scoring summary: Clapper (Barry, Gracie), Stewart (Beattie) and Barry (Gracie). Apparently the usual lines were being used, so it's not clear why the starting line was different.
vs
NYA Martin-Himes-Jackson
12-12-33
Gracie-Barry-Clapper
vs
TOR Cotten-Blair-Sands
* This was the Shore/Bailey game.
12-14-33
Gracie-Barry-Clapper
vs
NYA Martin-Himes-Jackson
12-17-33
* This game saw Clapper move back to defense, replacing the suspended Shore. The starting line for Boston was Beattie-Stewart-Lamb. Harry Oliver probably took Clapper's spot at RW.
vs
NYR Cook-Boucher-Cook
12-19-33
Same lines as last game -- Clapper at D, the Stewart line started. Still not completely clear who is Barry's RW. This was Babe Siebert's first game with the team.
vs
MTM Ward-Smith-Northcott
12-23-33
Same lines. Oliver confirmed as Barry's RW based on a scoring play in which Barry won a faceoff to Clapper, and Oliver ended up scoring from the wing.
vs
CHI March-Romnes-Thompson
12-26-33
Same lines, with the interesting exception that Boston put Barry on the ice with Stewart's line in a last-minute push.
vs
TOR Sands-Thoms-Kilrea
12-29-33
Stewart's line still starting, and the scoring summary indicates that at least Barry and Oliver were still skating together.
vs
MTL Gagnon-Morenz-Joliat
1-2-34
Beattie-Stewart-Lamb started
vs
MTM Northcott-Smith-Ward
1-4-34
Siebert-Barry-Oliver *note that the Bruins were using Siebert as a forward even though their D was weakened
vs
OTT Shannon-Kaminsky-Finnigan
1-6-34
Siebert-Barry-Oliver
vs
MTM Northcott-Smith-Ward
1-9-34
Barry-Beattie-Oliver *Note Barry moved to LW
vs
NYA McVeigh-Himes-Martin
1-12-34
Siebert-Barry-Oliver
vs
CHI Gottselig-Leswick-Couture
1-14-34
Siebert-Barry-Oliver
vs
DET Lewis-Weiland-Aurie
1-16-34
Siebert-Barry-Oliver
vs
MTL Joliat-Lepine-Gagnon
1-18-34
Siebert-Barry-Oliver
vs
TOR Doraty-Blair-Sands
1-21-34
Gross-Barry-Clapper *note both Clapper and Siebert now at forward, Shore still out
vs
McVeigh-Himes-Martin
1-23-34
Gross-Barry-Clapper
vs
DET Lewis-Weiland-Aurie
1-28-34
Siebert-Barry-Oliver *Eddie Shore returns to lineup
vs
NYR Cook-Boucher-Cook
1-30-34
Siebert-Barry-Clapper
vs
NYR Cook-Boucher-Cook
2-1-34
Galbraith-Barry-Clapper
vs
DET Lewis-Weiland-Aurie
2-4-34
Galbraith-Barry-Clapper
vs
CHI March-Romnes-Thompson
2-6-34
Siebert-Barry-Clapper
vs
NYA McVeigh-Himes-Martin
2-10-34
Siebert-Barry-Clapper
vs
MTM Northcott-Haynes-Ward
2-13-34
Siebert-Barry-Clapper
vs
NYR Cook-Boucher-Cook
2-15-34
Siebert-Barry-Clapper
vs
MTM Northcott-Haynes-Ward
2-17-34
Oliver-O'Neill-Hartnott *The summary doesn't explain Ross' choice of this unusual starting line. Harnott played only 6 games and never scored a point in the NHL. Also, Shore was lost to a leg injury a couple of minutes into the game so who knows what adjustments were made after the puck was dropped.
vs
TML Doraty-Blair-Cotton
2-20-34
Siebert-Barry-Clapper
vs
DET Lewis-Weiland-Aurie
2-22-34
Siebert-Barry-Clapper
vs
OTT Shannon-Kaminsky-Finnigan
2-24-34
?
2-27-34
Siebert-Barry-Clapper
vs
CHI Thompson-Romnes-March
3-1-34
Siebert-Barry-Clapper
vs
MTL Joliat-Morenz-Larochelle
3-3-34
Siebert-Barry-Clapper
vs
MTL Joliat-Morenz-Larochelle
3-6-34
Galbraith-Barry-Clapper
vs
TML Shill-Primeau-Conacher
3-13-34
Siebert-Barry-Clapper
vs
OTT Shannon-Kaminsky-Finnigan
3-15-34
Siebert-Barry-Clapper
vs
NYR Cook-Boucher-Cook
3-18-34
Siebert-Barry-Clapper
vs
NYA McVeigh-Chapman-Himes
So, here is the breakdown of Barry's positional assignments:
Definitely at center - 39
Definitely at left wing - 1
Unknown, but no reason to suspect a change from center - 2
Unknown, due to line not starting during Shore's absence, but likely at center - 5
Game not reported - 1