Final answer:
The provided text excerpts do not mention a character named Will or how he might have found the old man's money. Instead, the excerpts describe the finding of gold in various forms and contexts by other characters.
Step-by-step explanation:
In the story Gold-Mounted Guns, the old man's money does not appear to be directly found by a character named Will.
The provided excerpts discuss the presence of gold and the process of acquiring it through activities such as washing gold from a stream and ragpicking, but they do not specify a character named Will finding the old man’s money.
Characters, including Maria, are shown to have interactions related to gold, and there are mentions of individuals making fortunes from gold in the canyons or disrupting peace in villages for gold.
Content from the excerpts suggests that gold is found in various forms, such as non-cohesive gold taken by Maria from the dentist's office, gold washed from the stream by Bess, and gold found in the form of nuggets and grains.
However, these instances do not directly answer the question about where Will found the old man’s money, and it appears there might be a mix-up with characters or story details.