Introducing...Sarah (Adventure awaits!)

Sarah and Lincoln is a novel with adventure in which I am about 50% done. It was a NaNoWriMo project that will not complete this November because my day job got in the way. The first 300 words introduce the first protagonist: 

Sarah sat silently on the slider. It swung slightly in the warm summer breeze that ruffled the wheat that was starting to head out in the field in front of her. The sun was warm and the old tabby cat lay nearby on the white painted porch.
 
She wore a plain gingham dress with a broad-brimmed straw hat. It was actually her favorite dress. She’d had it for almost twenty years; bought at a barn-raising when the Amish had first moved into the area. She liked the hat, too, though it was a more recent purchase, at the Marshall’s over in Sioux City.
 
A pensive smile rested on her face, her eyes focused at something impossibly far away. Her hands were folded peacefully on her lap, a small white leather clutch held lightly. They, like her face, were lined and tanned.
 
From the field came the call of a whippoorwill. Two grackles swooped onto the yard and cocked their heads at Sarah and the cat, intrigued by their quiescence. They soon lost interest and looped back to the field.
 
Bemused, Sarah put a hand on the arm of the slider and levered herself slowly upright. She was ready. The decision had been well considered and she was comfortable with it. The shock would be palpable nonetheless. She almost looked forward to what was to come.
 
She walked slowly, with a step more struggle than would be expected from the rest of her appearance. The cat looked up but did not otherwise stir. He had his priorities.
 
The screen door opened easily under Sarah’s touch and she entered the relative dimness of the rear parlor. It was empty, as she knew it would be. The room was rarely used these days. The time of card parties past midnight, sweet sixteens, and sleepovers well past.