By that time Mr. Peng had been blacklisted from returning to Taiwan, after a military court in 1964 convicted him of sedition over his involvement with two of his students in the printing of a manifesto calling for the overthrow of the Republic of China government and the establishment of a Taiwanese democracy. American pressure on Chiang Kai-shek to release Mr. Peng had led to his transfer from an eight-year prison sentence to house arrest in 1965. With help from Amnesty International, he escaped in 1970, fleeing to Sweden. The…