Answer:
The thought of owning a pair of trousers was great indeed!
Step-by-step explanation:
In order to be able to affirm the claim that Douglas has few material possessions, we need to look for a sentence in which he refers to what he owns.
In the first two sentences, he speaks of his looks and hygiene. The last one expresses his hopes for a reward, so, no current possessions yet.
The thought of owning a pair of trousers was great indeed!
Although it doesn't strike us at first, Douglas speaks of owning a pair of trousers. And he does it in such a way that we reckon that it is probably all he has. It makes him so proud to think he owns a single pair of trousers, as proud as a rich man would have been, speaking of his infinite possessions.