El Bar Americano en España by Pedro Chicote (1927, p.103)

1 mandarinjugo de mandarina — jugo de una mandarinaacid
1 copitadry gin — 1 copita de dry ginbase
ice — 2 ó 3 pedacitos de hielobase
Seltzer water — agua de seltzdilution
1 wholeclara de huevo fresco — 1 clara de huevo frescoother
2 tablespoonjarabe de azúcar — 2 cucharadas de jarabe de azúcarsweetener
  1. Shake very well, strain into a large glass, and finish with seltzer.

Ice: Ice

Cocktails by Pedro Chicote (1928, p.268) — Mandarin version

1 mandarinmandarin juice — Jugo de una mandarinaacid
0.5 copitadry gin base
ice — Hielobase
Seltzer water — Agua de seltzdilution
0.5 whiteegg white — Clara de huevoother
2 tablespoonSugar syrup — Jarabe de azucarsweetener
  1. Shake very well and top with seltzer in a large glass.

Ice: 2 or 3 pieces ice

This matters because it preserves a mandarin-led fizz branch inside Chicote's late Madrid chapter.

See also: Gin Fizz, Texas Fizz