Daughter of Horror

Daughter of Horror is a 1955 American horror film. Dementia the parent film, had no dialog but a soundtrack was added later. Added narration and some editing resulted in the Daughter of Horror release.

DVD Talk calls the added words "a tone poem," saying

If you don't care for mini-budgeted, dank and creepy, old and eeky horror films that crawl out from under rocks, well, Dementia /Daughter of Horror might not be your glass of tea. Finally seeing it in a version that doesn't require night-vision goggles was truly a thrill - maybe some films must be coveted for 30 years, to work up an appropriate lack of perspective!

TCM has an interesting article which includes this:

As critic Gary Don Rhodes notes: "The real horror in Daughter of Horror is the threat of women's resistance to their own objectification and abuse. Such resistance could be figured for audiences in the 1950s perhaps most vividly within the generic space of the horror film and encoded in the language of mental disease because these provided conceptual frameworks that could limit and contain the implications of the film." A woman who takes up arms against the cruelty of her father or the sexual exploitation of predatory men is a direct threat to the accepted sex roles of the 1950s. Thanks to a little mayonnaise in the form of McMahon's narration, such subversion became palatable.

366 Weird Movies has some fascinating background information, including this:

• The film [Dementia] contains no dialogue, although it’s not technically a silent film as some sound effects can be heard.
• Director John Parker has only Dementia and one short film (a dry run for this feature) in his filmography. We know little about him except that his parents were in the film distribution business.
• Star Adrienne Barrett was Parker’s secretary, and the film was inspired by a nightmare she related to Parker.

...

• After failing to find success in its original dialogue-free form, Dementia was re-released in 1957 with narration (from future late night talk show sidekick Ed McMahon) and retitled Daughter of Horror.
• Daughter of Horror is the movie teenagers are watching in the theater when the monster strikes in The Blob.