Sentence:  Sir Thomas looks as if to ask what the <WSD>dash</WSD> is that to you! but wanting still to go to India again, and knowing how strong the Newcomes are in Leadenhall Street, he thinks it necessary to be civil to the young cub, and swallows his pride once more into his waistband. / Comment: Some editions leave this passage out. Of those that include it, some change the 'you!' to 'you?'. 
Meaning of the word marked with <WSD> tags:  (A stand-in for a censored word, like "Devil" or "damn". (Compare deuce.))