He took a sheet from his pocket, and read aloud: "Come at once, Astley Priors, Gatehouse, Kent.
He read in his head before saying what has been mentioned aloud. 
mnli hypothesis: He read in his head before saying what has been mentioned aloud.  premise: He took a sheet from his pocket, and read aloud: "Come at once, Astley Priors, Gatehouse, Kent.