Here is a list of wanted Pillsbury material:

Date/Opponent: followed by cited source.
1900.08.19/Buz,R: Retrieved April 13, 2023, from https://database.chessbase.com/ "Chessist" says check <Augsburger Postzeitung>/<Augsburger Schachblatt> or <Neue Augsburger Zeitung>/<Der Schwäbische Postbote>

1900.08.19/Martin: Retrieved April 13, 2023, from https://database.chessbase.com/

1900.08.19/Oberhauser,F: Retrieved April 13, 2023, from https://database.chessbase.com/

1900.08.19/Dyckhoff,E: Retrieved April 13, 2023, from https://database.chessbase.com/

1900.08.19/Epstein,L: Retrieved April 13, 2023, from https://database.chessbase.com/

1900.08.19/Übelhoer,D: Retrieved April 13, 2023, from https://database.chessbase.com/

1902.04.25/Taylor,TWH: Quarterly for Chess History, v1 n1, Spring 1999, p25 (Western Daily Mercury, 1902.04.25)

1902(.04.26)/Chant,EE: Quarterly for Chess History, v1 n1, Spring 1999, p25 (no source cited)

1902.06.29/Keller,A: Quarterly for Chess History, v2 n5, Spring 2000, p83 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 1)

1902.06.29/Nauhaus: Quarterly for Chess History, v2 n5, Spring 2000, p83 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 2)

1902.06.29/Liebenstein,H: Quarterly for Chess History, v2 n5, Spring 2000, pp83-84 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 3)

1902.06.29/Sattler: Quarterly for Chess History, v2 n5, Spring 2000, p84 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 4)

1902.06.29/Mertens,G: Quarterly for Chess History, v2 n5, Spring 2000, p84 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 5)

1902.06.29/Auerbach: Quarterly for Chess History, v2 n5, Spring 2000, p85 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 6)

1902.06.29/Wallerstein: Quarterly for Chess History, v2 n5, Spring 2000, p85 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 7)

1902.06.29/Schmidt: Quarterly for Chess History, v2 n5, Spring 2000, pp85-86 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 8)

1902.06.29/Gebuehr Jr: Quarterly for Chess History, v2 n5, Spring 2000, p86 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 9)

1902.06.29/Busse: Quarterly for Chess History, v2 n5, Spring 2000, p86 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 10)

1902.06.29/Seidenberg: Quarterly for Chess History, v2 n5, Spring 2000, p87 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 11)

1902.06.29/Tenner: Quarterly for Chess History, v2 n5, Spring 2000, p87 (Blindlingspartien des Schachmeisters H. N. Pillsbury 29. Juni 1902, Köllner Schachclub, Game 12)

1902.08.16/Antze,P: "Chessist"; cites Bremer Nachrichten, 1902.09.21

1902.08.16/Brinkmann,H: "Chessist"; cites Bremer Nachrichten, 1902.08.31

1902.08.16/Gartelmann,H: "Chessist"; cites Bremer Nachrichten, 1902.10.05

1902.08.16/Möschler,P: "Chessist"; cites Bremer Nachrichten, 1902.10.26

1902.08.16/Schwartze,J: "Chessist"; cites Bremer Nachrichten, 1902.11.09

1902.08.16/Valett,W: "Chessist"; cites Bremer Nachrichten, 1902.09.28

1902.08.16/Zahn,W: "Chessist"; cites Bremer Nachrichten, 1902.08.24

1902.08.22/Petersen,G: "Chessist"; cites Hamburgischer Correspondent, 1902.08.30

1902.08.22/NN: "Chessist"; cites Hamburgischer Correspondent, 1902.08.23

1902.09.19/Fleischmann,L: Quarterly for Chess History, H. N. Pillsbury, I. Bottlik, v2 n6, Summer 2000, pp100-101 (no source cited)

1902.09.20/NN: Quarterly for Chess History, H. N. Pillsbury, I. Bottlik, v2 n6, Summer 2000, pp104-105 (no source cited)

1902.10.04/Kuerschner: Quarterly for Chess History, v4 n13, Winter 2007, p391 (Der Sammler, 1906.08.25)

1902.12.17/Scholz,MJ: Quarterly for Chess History, v2 n5, Spring 2000, p127 (Pall Mall Gazette, 1903.01.10)

1902.12.22/Funk: Quarterly for Chess History, v2 n6, Summer 2000, p14 (Western Daily Mercury, 1903.01.23)

1903.01.29/Cooper,CF: Quarterly for Chess History, v2 n6, Summer 2000, p22 (Western Daily Mercury, 1903.02.06)

1903.01.31/Moore,HC: Quarterly for Chess History, v2 n6, Summer 2000, p24 (Daily Chronicle and Argus, 1903.02.02)

1903.04.17/Nicole,RS: Quarterly for Chess History, v2 n6, Summer 2000, p57 (no source cited)

(1903.04.23)/Hall,W: Quarterly for Chess History, v2 n8, Winter 2002, p496 (St. John Globe, 1905.11.17)

Reports:
De Telegraaf, 1903.01.04
Evening North Wilts Herald, 1903.01.24
Western Daily Mercury, 1903.01.28
Cornish Post and Mining News, 1903.01.29
Sussex Daily News, 1903.04.25