Responsa על בבא בתרא 93:4

Rabbi Shlomiel is commended on his decision that one is not permitted to eat on a holiday the food prepared with an egg laid on the same holiday, since this food may be eaten after the holiday without hesitation.
SOURCES: Cr. 46; Pr. 100; L. 368.

Q. B and his sons claim to have received permission to settle in town T, and, they also show undisturbed settlement for more than three years. A claims that B and his sons received no such permission and that the only reason they were not disturbed was because they were informers and he was afraid of them.
A. Since B and his sons claim to have received permission to settle in T, and also show three years of undisturbed settlement, they have the right to dwell in T, and to prevent all newcomers from settling in T without their permission. If, however, A proves that B and his sons are informers, the latter cannot claim undisturbed settlement. If only B was proven to be an informer, his sons may still claim undisturbed settlement for themselves if their claim is entirely independent of that of their father.
SOURCES: Cr. 47; Pr. 100; L. 369; Mord. B. B. 532.