More on Betwixt and Between from Infoplease:

• Betwixt and Between - Betwixt and Between Neither one nor the other, but somewhere between the two. Thus, grey is neither ...
• betwixt: meaning and definitions - betwixt: Definition and Pronunciation
• Vesper Hour - Vesper Hour is said to be between the dog and the wolf; “betwixt and between,” neither ...
• Fish - Fish The French have a remarkable locution respecting fish as a food: Aprés poisson, lait ...
• Dictionary of Phrase and Fable: B - Definitions, origins, and illustrative excerpts for words, phases, and literary allusions starting with "B"