1947. At Seaside Cottage. No passwords.
1948. Secret of the Old Mill - Tiddlywinks,Wenceslas,Hee-haw,
But Tiddly-winks is no longer their password, because too many people know it now.
They've thought of something else. It begins with an H and ends with a W, and I know it has something to do with a donkey.
Whatever can it be ?
1949.The Secret Seven - Wenceslas,Week-days,
1950.Secret Seven Adventure - Rabbits,Indians!,Adventure,
1951.Well Done Secret Seven - Adventure,
1952.Secret Seven on the Trail - Picked Onions,Cheeky Charlie,
1953. Go Ahead Secret Seven - Jack Sprat,Beware,Bamboozle,
1954. Good Work Secret Seven - Guy Fawkes,Fireworks,
1955. Secret Seven Win Through - Thursday,Easter-egg,
1956. Three Cheers Secret Seven - Lollipops.Grim,
1957. Secret Seven Mystery - Mint Sauce,Stable-boy,
1958. Puzzle for the Secret Seven - Wuff!,Thump!,
1959. Secret Seven Fireworks - Wee Willie Winkie,
1960. Good Old Secret Seven - wuff-wuff,Telescope,pictures,
1961. Shock for the Secret Seven - Toad-in-the-Hole,
1962. Look Out Secret Seven - Holidays!,
1963. Fun for the Secret Seven - Scamper,
The Secret Seven Short Story Collection
The Secret of Old Mill {Secret Seven} - Tiddlywinks,Wenceslas,Hee-haw
The Humbug Adventure {Secret Seven}
Adventure on the Way Home {Secret Seven}
An Afternoon with the Secret Seven
Where Are the Secret Seven
Hurry, Secret Seven, Hurry!
I don't think there are any other passwords in the shorts stories except the one listed above???