plaira. For the tense see R.B

1. 4. au regard, E.B. 150. We should alter the order a little and say 'by the sidelong glance which... I saw...'

1. 6. lestement, perhaps 'unceremoniously.' leste is sometimes equivalent to the English light in a bad sense, e.g. light conversation.

1. 8. avec plus de suite, 'less abruptly.' There is no popular English word answering to suite. A technical term 'logical sequence' renders it accurately, but would be out of place here.