Post-postscript

There was the first burst of Gladstonian reconciliation at the Devonshire, and then the apparent return to Unionist orthodoxy at Liskeard, and then the relapse in the letter to the people of Aberdeen, and now the protestation of persistence in that relapse at the Eighty Club, together with not a few minor manifestoes, explanations, postscripts, post-postscripts, and so forth, and even more recently the address at Manchester.

Source: wiktionary

He wrote at enormous speed, and his thought often travelling quicker than his pen led to inevitable and sometimes famous postscripts and post-postscripts.

Source: wiktionary

He rushes on helter-skelter, as the fancy takes him, into postscripts longer than his letters, and post-postscripts longer than all.

Source: wiktionary