Found this and I didn't remember an Auston's Ark Battery of Irish from NE Ark. Maybe this one slipped by me but thought you might be interested if you have not seen this before.

THE FIRST CONSOLIDATION CAME AFTER THE RETREAT FROM CORINTH, MISS. WHEN THE CONFEDERATE ARMY WAS REORGANIZED AT TUPELO, MISS. IN JULY OF 1862. AUSTON’S BATTERY (ARKANSAS) WAS DISBANDED AND ABOUT THIRTY MEN, DESCRIBED AS MOSTLY IRISH, WERE TRANSFERRED INTO DARDEN’S BATTERY JUST BEFORE THE KENTUCKY CAMPAIGN. THIS COMPANY SEEMS TO HAVE BEEN ORGANIZED IN THE NORTHEASTERN PART OF THE STATE OF ARKANSAS NEAR THE TOWNS OF PITMAN’S FERRY AND POCAHONTAS IN THE SUMMER OF 1861. IT WAS ASSOCIATED WITH TRIGG’S BATTERY WITH WHICH IT FOUGHT AT THE BATTLE OF SHILOH.