Jag hittade ett bättre citat om sydlänningens halvorchiskhet. Det ger kanske inget helt säkert svar heller, men det antyder i alla fall ganska starkt att han har lite orcherblod i sig.
Citatet är från TTT, när Merry sitter på Isengårds ruiner och berättar för Aragorn & Co om Sarumans armés uttåg.
Most of them were ordinary men, rather tall and dark-haired, and grim but not particularly evil-looking. But there were some others that were horrible: man-high, but with goblin-faces, sallow, leering, squint-eyed. Do you know, they reminded me at once of that Southerner at Bree: only he was not so obviously orc-like as most of these were.'
'I thought of him too,' said Aragorn. 'We had many of these half-orcs to deal with at Helm's Deep. It seems plain now that that Southerner was a spy of Saruman's; but whether he was working with the Black Riders, or for Saruman alone, I do not know. It is difficult with these evil folk to know when they are in league, and when they are cheating one another.'
Jag kan för övrigt å det varmaste rekommendera att ha böckerna i elektronisk form! Det gör det busenkelt att söka. Jag letade bara efter ordet "southerner" och hittade den här passagen direkt. (Jag önskar bara att jag hade även den svenska versionen elektroniskt, det hade gjort studier av översättningen avsevärt enklare.)