"A Matter of Traces" is a science fiction short story by American writer Frank Herbert, first appeared in Fantastic Universe magazine in November 1958 and later in Herbert's 1985 short story collection Eye.

Secretary Hablar comes to present a sample of the work being done by the Historical Preservation Team.

During the course of the interview it is learned that Hilmot was the inventor of the rollitor, a plow harness for an alien life form native to the planet, and also the man who discovered what swamp cream does for the complexion.

Although there is not explicit reference to the Bureau of Sabotage in this story, Jorj X. McKie appears for the first time in his capacity as saboteur extraordinary.

While none of these works are exactly sequels they take place in the same imaginary universe and share the character, Jorj X. McKie.