Passes his BA examinations on 22 January without honours and remains at Cambridge for a further two terms to fulfill residence requirement. Spends much time with Henslow, and in August accompanies Adam Sedgwick, Professor of Geology, on his annual field trip to Wales. In August he returns to Shrewsbury from Wales to find a letter from Henslow inviting him to join the Beagle voyage. Begins The Beagle diary. After two false starts, the ship leaves Plymouth on 27 December.