In mid-November, the expedition received word from General Gordon that he could only survive the siege for another forty days. The expedition was attacked by rebels at Abu Klea and Abu Cru, but was able to repel the rebels both times. Progress up the river was slow and often the boats had to be pulled through rapids by rope from shore. At several places the strength of the current necessitated several crews pulling one boat. They settled on a method of stationing the voyageurs at difficult stretches along the river, so that each group would become familiar with a particular stretch of water.