Character mistake: When Nanny is coming home from getting the collars, she calls for Roger and Anita to come downstairs. Plowright accidentally says "Roderick, " rather than "Roger."
Continuity mistake: When Pongo is pulling Roger on his bike and flings him into the pond there's autumn foliage on the trees. Shortly after, when Perdita pulls Anita on her bike and flings her into the same pond, the leaves are gone.
Revealing mistake: When a puppy goes to urinate on a magazine with Cruella Devil's face on it, a black tube where the fake urine comes out is visible. (01:08:27)
Answer: It was typical for marriages to be announced in the print newspapers, just like births and deaths. They are public notices.
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