EXHIBIT 4 KEYSPAN GAS EAST CORPORATION GLOBAL MEDIUM-TERM NOTE, SERIES A THIS NOTE IS A GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. UNLESS AND UNTIL IT...Global Medium-Term Note • February 1st, 2000 • Keyspan Corp • Natural gas distribution
