Part Four, covering the period 1810-1815, was a crucial one for Southey’s career and reputation. It has, however, never before been fully documented or fully understood. By 1810 he was established in Keswick...
244. Robert Southey to William Owen [Pughe], 9 August 1797 *
I am very much obliged to you for the information you have so kindly afforded me. you will, I hope, excuse the liberty I take in still soliciting more.
I am taking Madoc to the Court of Owen Cyveiliōc.  will you be kind enough to tell me where that Court was, whether at Mathraval? & to give me some little sketch of Cyveiliocs history. I shall make Madoc present at a Gorsedd in Powys, & must not omit to thank you for the knowledge I have gaind upon this & other branches of Welsh antiquities from your Llywarc Hen. 
will you favour me with a letter? my direction is Burton. near Ringwood. Hampshire. I must likewise beg you to give me the pronunciation. am I right in calling him Cūvaīlïöc?
I am Sir
yr much obliged
August 9. 1797.