Now, a free woman.

Although Tubman married in 1844, she did not forget her vow to fight. Quiet as she seemed to those around her, she was only biding her time until she could escape with her brothers, and, in 1849, the three set out together. Although her brothers eventually gave up, Tubman did not. Hunger and exhaustion could not deter her. From her point of view, death was a better alternative than slavery. Spending long nights alone in the woods, Tubman traveled hundreds of miles until she arrived in Philadelphia, a free woman. The year was 1850, and Tubman was just thirty year old.
[Source: Reading for Results Ninth Edition by Laraine Flemming]
I'd like to know what usage both a subject and verb is omitted by.
Thank you in advance for your help.