[ScreamingFist]

Still haven't found hide nor hair of the Arvand River, though.

Situated 115 kms south-west of Ahvaz, Iran on the Arvand Rood (Arvand River), Abadan is a leading economical centre in Iran. Rich mineral resources contribute to the importance of this major port. At night, the lights mirrored in the water of the river afford an impressive sight.

[Boot Hill]

Got it! Thanks for posting that. It looks like the Arvand River is at the confluence of the Karun, Bahmanshir and Shatt al-Arab rivers, near the city of Abadan. Looks like the Brits were where they belonged.

--Boot Hill