From countless hours of poring over Lovecraft, his usage of semicolons has been found to be somewhat odd. At times, he'll place them where a comma would usually be seen; sort of like this. For example,
Dr. Muñoz I had never heard, save for certain sounds as of some gasoline-driven mechanism; since his step was soft and gentle.
Mrs. Herrero crossed herself when she looked at him, and gave him up unreservedly to me; not even letting her son Esteban continue to run errands for him.
After that I paid him frequent overcoated calls; listening while he told of secret researches and almost ghastly results, and trembling a bit when I examined the unconventional and astonishingly ancient volumes on his shelves.
The waves from that thing are waking a thousand sleeping senses in us; senses which we inherit from aeons of evolution from the state of detached electrons to the state of organic humanity.
Lovecraft was a weird man, so it's not surprising that he'd have a weird style. However, with that being said, is this usage "correct"? Could someone be flagged as wrong for emulating it? And if not, why isn't it seen more often?