Question

Passage:

When the Berlin Observatory finally turned its telescope toward the coordinates provided by French mathematician Urbain Le Verrier in September $1846$, the discovery of Neptune was secured within hours. However, the path to this moment was paved with decades of unacknowledged labor. Years earlier, in $1821$, Alexis Bouvard had published detailed tables of Uranus's orbit, only to watch observations deviate from his predictions almost immediately. It was this discrepancy that prompted a young John Couch Adams in $1841$ to begin his own calculations in Cambridge, though his work was largely ignored by the British astronomical establishment. Le Verrier, working independently in Paris, completed his calculations in early $1846$, shortly before sending his fateful letter to Johann Galle in Berlin. While history often remembers Galle as the first to see the planet, it was Bouvard's initial mapping of Uranus's anomalous motion that set the entire mathematical search in motion.

Based on the passage, which of the following events occurred after John Couch Adams began his calculations in Cambridge but before Urbain Le Verrier sent his coordinates to Johann Galle?