"Not seen," Ran Yan said.
Erasing her trail in the Princess' Courtyard wasn't something that could be done in a short period of time, and also, from Xiao Song's recent demeanor, he didn't seem likely to return immediately. So, Ran Yan guessed this person was not Xiao Song.
Visibility was not high at night; if someone were trailing her, they would not dare to follow too closely. It only required someone with a similar build to Xiao Song and a slight resemblance to him to pass off as him.
Xiao Song simply used these stalkers to provide an alibi: the Assistant Minister and his lady are having a dispute, busy pacifying his wife, how could he have time to commit arson or murder!
Since it wasn't Xiao Song, Ran Yan had no interest in dealing with it. She ordered the maid not to come and report anymore, to deny the visitor regardless of what he said. Then she went to bathe and retire for the night.