ACR ACFT ALLOWED TO PENETRATE ADJACENT ARTCC AIRSPACE WITHOUT POINTOUT OR HDOF.

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MLG NEVER CAME ON MY FREQ. I; HOWEVER; ISSUED DSCNT CLRNC TO CROSS SOMTO INTXN AT 13000. I DID NOT GET A READBACK AND FAILED TO REALIZE IT. MLG GOT OVER SOMTO AT FL260 WITHOUT A POINTOUT TO ZNY. SUPPLEMENTAL INFO FROM ACN 210343. MLG WAS OVER KERNO AT FL260; R-SIDE GAVE THE MLG A CLRNC TO CROSS SOMTO AT 13000 AND PLT DID NOT READ IT BACK. I DO NOT REMEMBER HEARING THE READBACK AT THE TIME. DURING THIS TIME TMU CAME OVER TO DISCUSS THE EWR FLOW CTL SITUATION WITH ME. ALSO I WAS BUSY ORGANIZING 15-20 NEW STRIPS INTO THE BAY. R19 ALSO ASKING ME TO COORD WITH MXE (N25) ON AN ALT FOR AN ACFT AND THEN ASKED ME TO TALK TO R53 ABOUT A HDOF ON AN ACFT APCHING SECTOR 53'S BOUNDARY. AFTER THIS WAS ACCOMPLISHED; MLG WAS OBSERVED AT FL260 IN ARD'S AIRSPACE. R19 TOLD ME TO POINT MLG OUT TO ETX (WRONG SECTOR) I CALLED ETX 3 TIMES IN A 20 SECOND TIME SPAN AND THEN REALIZED MY MISTAKE AND PROMPTLY CALLED ARD AND POINTED THE MLG OUT. MLG WAS APPROX 10 MI INSIDE OF ARD'S AIRSPACE BEFORE THE POINT OUT WAS COMPLETED. THE PLT OF MLG DID RPT GETTING WITHIN 4 MI OF AN UNIDENTED ACFT AT THE SAME ALT; BUT THIS IS UNVERIFIED.