Over the river, and through the wood,
To grandfather’s house we go;
The horse knows the way,
To carry the sleigh,
Through the white and drifted snow.

Lydia Maria Child (1802-1880) American abolitionist, activist, journalist, suffragist

“The New England Boy’s Song About Thanksgiving Day,” st. 1
    (Source)

Found in Child's book, Flowers for Children, Vol 2: For Children from Four to Six Years Old (1845). Alternate titles for the song include "Thanksgiving Day" and "A Boy's Thanksgiving Day."