|bīən(d)|bī, (ˈ)bīn(d)|bī, (ˈ)bīm|bī, |bīəm|bī, ˌbəmˈbī adverb
Etymology: by (II)
1. obsolete : at once : immediately
the end is not by and by — Lk 21:9 (Authorized Version)
2. : in a little while : before long : soon
by and by he discovered that the black night had changed to gray — Zane Grey