In response to Havals question, Marc will do another Mind Scan (The rogue trader version, page 164). Last time, from this post, Bennosuke said there are 3-4 people in the house, so Marc is trying to be more precise.
This power has no Threshold, so it's a straight vs base roll (correct me if I'm wrong)
Mind Scan: (1d100)[58] vs TN 90
That's 3 successes.
Marc knows "the number, general location and relative 'strength' of conscious minds within the area of effect and may determine if those minds are themselves psykers with a successful Challenging (+0) Psynisicence Test; plus the psyker may attempt to initiate telepathic communication with any of the minds he has sensed in the area."
So she knows all the minds within a 1km radius, she knows how many there are and their general location and 'strength' of each mind.
So, is there anyone else within Drimmles house?