What is "Five Fruits" in this 1920s cocktail recipe? From Shake 'Em Up! A Handbook of Polite Drinking (1930), page 46:

GIN PUNCH NUMBER ONE

2 quarts of grapefruit juice
2 quarts of gin
and one quarter cup of Five Fruits or Grenadine

Keep the punch in the ice box for two hours before serving time,
so that it will be thoroughly chilled.
Pour over chopped ice in the bowl and serve at once.

What exactly is &quot;Five Fruits&quot;? From context I infer that it's a sweet juice blend, maybe something like modern-day Hawaiian Punch; but I haven't been able to Google up anything about the name because everyone on the Internet wants to tell me about 1980s-era beverage Five Alive.
Old advertisements show that it was made starting in 1900 in Portland, Maine. It consisted of a syrup made of pineapple, orange, lemon, raspberry, and strawberry juices with sugar, red food coloring, and sodium benzoate as a preservative. Unfortunately, I can't find anywhere what the ratios are, but I'd start by doing equal parts of juice in a 1:1 ratio with sugar for the syrup since it was compared to grenadine as being an analogous substitute.




  The Hay’s Fruit Juice Company was founded in the year 1900 and produced Hay’s Five Fruit, a fruit juice syrup used to make and flavor beverages and desserts. This album was created after September 1923, following the completion of additional construction to a recently purchased new factory at 55-71 York Street, in Portland, Maine. - Hay's Fruit Juice Company album