When a progressive tense is used in the independent clause, the dependent clause typically uses the tense.
simple past
simple present
progressive past
progressive present

When a progressive tense is used in the independent clause, the dependent clause typically uses the simple past tense. 

Ibelieve this is the part where ulysses reveals his true identity to his faithful servants eumaeus and philaetius: his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed: these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.