Sergeant Clifford was a young woman who questioned Lyra Silvertongue when she visited Mary Malone in the Dark Matter Research Unit. She was working alongside Inspector Walters.

Clifford and Walters were trying to find out about Will Parry, who had been seen with Lyra. The two quizzed Lyra about where she came from, where she went to school and who she was staying with before springing on her a question about whether Will was staying with her. Lyra began to say yes before, realising her mistake, getting up and darting through the door. Clifford tried to follow her but Mary tripped her up, blocking Walter's way and allowing Lyra time to flee.[1]



  1. The Subtle Knife, Chapter 7
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