On 23 July, they set off again longing to reach home, but FitzRoy, who wanted to ensure the accuracy of his longitude measurements, took the ship across the Atlantic back to Bahia in Brazil to take check readings. Darwin was glad to see the beauties of the jungle for one last time but now compared "the stately Mango trees with the Horse Chesnuts of England." The return trip was delayed for a further 11 days when weather forced "Beagle" to shelter further up the coast at Pernambuco, where Darwin examined rocks for signs of elevation, noted "Mangroves like rank grass", and investigated marine invertebrates at various depths on the sandbar. "Beagle" departed for home on 17 August. After a stormy passage including a stop for supplies at the Azores, the Beagle finally reached England on 2 October 1836 and anchored at Falmouth, Cornwall.