grammar school Latin in The Player's Boy

[smellingbottle.livejournal.com]

Would some kind Latinist please provide a better translation than mine of the Latin phrases Nicholas and Adam exchange when Philip Catchpole passes at the start of The Player's Boy, and again when they meet at the end of The Players and the Rebels?

... Adam stated loudly and improbably, 'Mores puerorum se inter ludendorum detegunt,' to which Nicholas replied loudly and automatically, 'Pervenire ad summa sine industria non potest'... (The Player's Boy)

MOAR MARLOEZ HEER

[owl]

NB: I'm not actually writing them at this rate.

The Ready-Made Family

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