- Through or near this gap flow northwards in parallel courses the rivers Heri-rud (Tejend) and Murghab, until they lose themselves in the desert of Kara-kum.
- About this time the Tekke Turkomans, then living on the Heri-rud, were forced by the Persians to migrate northward.
- Heri, mod.
- Of the foundation of Herat (or Heri, as it is still often called) nothing is known.
- Haraiva), in the vicinity of the river Anus (Heri-rud), which derived its name from them.