Frank Marshall came to Poland in the autumn of 1908. First, he played in this tournament (during September but maybe overlapping into August or October) and the Game Collection: Rubinstein - Marshall, Match (1908) afterwards.

This tournament is important since all the participants - Frank Marshall, Akiba Rubinstein and Georg Salwe - were of GM strength.

The players took turns playing each other but it's not known when the games were played (i.e. if Marshall played Rubinstein first or Salwe or if Rubinstein faced Salwe first and then Marshall or Salwe Marshall, etc.). So I give the games in bulks.

Final crosstable:

1. Rubinstein 9.5/16 (+6 -3 =7)
2. Marshall 8.0/16 (+4 -4 =8)
3. Salwe 6.5/16 (+2 -5 =9)

Rubinstein beat Marshall 4.5 - 3.5 (+3 -2 =3)
Rubinstein beat Salwe 5-3 (+3 -1 =3)
Marshall beat Salwe 4.5-3.5 (+2 -1 =5)

Rubinstein received 400, Marshall 250 and Salwe 150 rubles.

Index:

1. Marshall-Salwe
Please note that one drawn game is missing (apparently Marshall played 1.d4 and they agreed to a draw)

2. Salwe-Rubinstein

3. Marshall-Rubinstein

Source: Pages 153-165 in Donaldson, John & Minev, Nikolay: "The Life & Games of Akiva Rubinstein. Volume 1: Uncrowned King", 2nd edition – revised and enlarged, Milford, Russell Enterprises 2006