Sentence:  Henry's carefully calibrated public appearances would present him as the wellspring of honour, justice and power, the unknowable, all-seeing sovereign who, as the Milanese ambassador Soncino <WSD>nicely</WSD> observed, appeared in public ‘like one at the top of a tower looking on at what is passing in the plain'. 
Meaning of the word marked with <WSD> tags:  Precisely; with fine discernment or judgement. (from 17th c.)