Many postcard captions contain simple spelling or typographical errors:

Several captions misidentify locations:

Post-earthquake b+w postcards from Souvenir Post Card Co. of N.Y. are particularly error-prone. Presumably rushed into print as soon as possible after the quake, probably with limited knowledge of conditions in San Francisco, these cards are not only poorly printed (e.g., missing letters) but also intentionally sensationalized, exaggerating earthquake damage:

Charles Weidner revised many of his pre-quake postcards after the quake, as described on Weidner variants. To capitalize on public interest in the disaster, he added earthquake/fire references to captions. Most of his revised captions are accurate (e.g., Weidner 116), though some are in questionable taste and misleading (e.g., Weidner 16, with former caption "Chinese Girls" replaced by "Chinese Aristocrats. Reduced to poverty by earthquake and fire April 18, 1906.").

Steve's SF postcard pages: