Reminded by the familiar instrument, he had thought of Gurney whose face he had seen in a smuggler band, but who had not seen him, could not see him or know of him lest that inadvertently lead the Harkonnens to the son of the Duke they had killed.
There are no more uses of "inadvertent" in the book.
Show samples from other sources
I must have inadvertently insulted her.
The destruction was inadvertent, but it was still a crime.