Time Passages

The premise of my novel, such as it is, is that Rachel Falk and Liam Ó Fionnmhacháin, respectively an M.D. and an English professor, travel back in time from 2089 to meet Jane Austen.

But I haven't spent a huge amount of time thinking about the physics problems posed by time travel or why does it have to be 2089, exactly, as opposed to 2809?

Hmm. Because you begin where you are. One has to start somewhere. Right now I am stranded in Chapter 19, which I have started at least six times. I keep writing more of it, as I commute, waiting underground trapped in the 1/ 2/3 IRT lines like someone in Dante's Inferno, but it is not adding up. I know where I need to go, but not how to get there.