<The following day the American played ten games simultaneously with three players at each board in consultation. Of these he was successful in five, drew two, and lost three. His opponents were the strongest Berlin could produce.

<Devon and Exeter Gazette, 1902.12.30, p3>>

<On the following day from thirty to forty players were pitted against him at ten boards. While Pillsbury conducted ten games simultaneously, from three to four players were consulting at each board against the single player and the arrangements were, of course, made in such a way as to prevent Pillsbury from hearing anything the consulting parties were discussing at their respective boards. After five and one-half hours of play Pillsbury had won five games, lost three and drawn the rest.

<New-York Daily Tribune, 1903.01.18, p11>>

<Appended are two of the games played at the Berlin Chess club against ten consulting parties simultaneously by Pillsbury during his recent exhibition there. The black allies in the first game are Januschpolski, Siegfried, and Freidmann, and in the second game are Danelies [sic; Danelius], Hoefer, and Lewett [sic; Lewitt].

Deutsches Wochenschach und Berliner Schachzeitung 1902.12,28 (No. 52), p. 429:

Am 23. Dezember spielte Pillsbury gleichzeitig 10 Partien gegen beratende Gegner <während er bei den Blindpartien wie immer den Anzug hatte, wechselte hierbei Anzug und Nachzug.> ...

Google translate gives me something like:

On December 23, Pillsbury simultaneously played 10 games against consulting opponents while he had the color with the blindfold games as always, the color and move changed.

<Pillsbury spielt auf seiner Rüdreise aus Rusland in Berlin am 22. d. 15 Partien gegen sehr starke Spieler gleichzeitig ohne Ansicht des Brettes und am 23. gleichzeitig 10 Berathungspartien gegen 30 stärkste Spieler Berlins.> <Prager Tagblatt, 1902.12.14, p10>