Responsa על בבא מציעא 209:4

Q. A and B jointly loaned money to a Gentile. When the Gentile repaid part of his obligation, A wanted to keep the entire sum for himself, and told B to collect his part from the Gentile.
A. A loan in the hands of a Gentile is very insecure. Therefore, A cannot dissolve the partnership until the entire loan is collected; and B is entitled to his share of the money already paid by the Gentile.
This Responsum is addressed to R. Isaac.
SOURCES: Cr. 49; Pr. 916; L. 372; Mord. B. M. 392; Rashba I, 869; Mordecai Hagadol, p. 293d.

Q. A and B jointly loaned money to a Gentile. When the Gentile repaid part of his obligation, A wanted to keep the entire sum for himself, and told B to collect his part from the Gentile.
A. A loan in the hands of a Gentile is very insecure. Therefore, A cannot dissolve the partnership until the entire loan is collected; and B is entitled to his share of the money already paid by the Gentile.
This Responsum is addressed to R. Isaac.
SOURCES: Cr. 49; Pr. 916; L. 372; Mord. B. M. 392; Rashba I, 869; Mordecai Hagadol, p. 293d.

Q. A and B jointly loaned money to a Gentile. When the Gentile repaid part of his obligation, A wanted to keep the entire sum for himself, and told B to collect his part from the Gentile.
A. A loan in the hands of a Gentile is very insecure. Therefore, A cannot dissolve the partnership until the entire loan is collected; and B is entitled to his share of the money already paid by the Gentile.
This Responsum is addressed to R. Isaac.
SOURCES: Cr. 49; Pr. 916; L. 372; Mord. B. M. 392; Rashba I, 869; Mordecai Hagadol, p. 293d.