as described on the live album "festival wind", alexander was reading an internet filk mailing list when his fans observed that they could sing "march of cambreadth" to the tune of his children's song "hap'n'frog" and vice versa. determined to embarrass himself before anyone else did it for him, he took the two songs "and let them have an afternoon together and breed." the result is "hap'n'frog of cambreadth," recorded on "festival wind".