"ct" ligature in Baskerville font
I'm trying to faithfully reproduce an 18th Century text. One of the elements in the text is a neat "ct" ligature: . Baskerville (the font that most closely matches the original that I can find) has just such a ligature…but when I insert it anywhere, it renders a question mark:�. Font book says that the name of this character is "Glyph 1,664." What's going on? Why can't I use a character that is clearly in the font I'm using?
~VIN,MacBook Pro (15-inch Mid 2010), macOS Sierra (10.12.6)