Complex sentence: Departing Montevideo by way of the Drake Passage, in 63 days she makes Bencoolen 23 August 1833 where the Dutch Resident reports the "Potomac" had completed her mission.
Split into simpler sentences: Departing Montevideo by way of the Drake Passage, in 63 days she makes Bencoolen 23 August 1833. The Dutch Resident reports the "Potomac" had completed her mission.