 Complete the following phrase:  Soon Skrzetuski was sent by Prince Jeremi Wiśniowiecki to Zaporizhian Sich as an envoy. During the mission he was wounded and taken captive. He was saved by Khmelnytsky, who was grateful for Skrzetuskis help. Khmelnytsky, however, didnt agree to set him free at once. Skrzetuski as a captive witnessed Polish defeat in 