You have provided the exact Latin sentence from Cicero's letter (Ad Familiares 7.8.2) right up to the famous linguistic shift.

As mentioned earlier, Cicero famously drops into Greek for the words "gratiarum actionem" (writing χαριστήριον or χαριστήρια scripto in the original manuscripts) to playfully describe the "thank-sharing" or expression of gratitude he received from Precianus regarding Trebatius.

Would you like to examine the grammatical breakdown of this specific sentence, or look into the historical significance of the British letters (Britannicas litteras) Cicero mentions immediately after?