On 12 March the boats reached a place where a tributary, later named "Helena River", joined the Swan from the east. The party also found another fresh water stream, which they named "Success", on the west side of the Swan. From this point on, the Swan narrowed and there were many obstructions. The next day, the cutter was holed and had to be repaired, after which the party reached a creek which Stirling named "Ellen Brook", after his young wife. The Swan was not navigable any further and Stirling and Garling set off on foot for the hills to the east, arriving at about sunset. On their return to camp they lost their way in the dark, but Frazer sent out search parties to guide them back. On 14 March the party split into three groups. Frazer went east and Belches and Heathcote north. Stirling and Clause went west and discovered a freshwater lagoon, some deserted aborigine huts and a fertile region which so pleased Stirling that he named it "Henley Park" after his Surrey home.