Saheb was looking for money in garbage dumps. The reasons why he was doing so are not explicitly stated in the text, but it can be inferred from the context. The following are some reasons why Saheb might have gone through garbage dumps:

Financial difficulties
- Saheb might have been going through financial difficulties and had no other means of earning money. He might have resorted to scavenging through garbage dumps to find money to sustain himself and his family.

Desperation
- Saheb might have been desperate to find money for a particular purpose, such as buying medicine for a sick family member, paying for his education, or paying off a debt. He might have felt that scavenging through garbage dumps was his only option.

Hope
- Saheb might have heard stories of people finding valuable items in garbage dumps and hoped to strike it lucky himself. He might have believed that he could find a silver coin, a rupee, or a ten rupee note in the garbage.

Determination
- Saheb might have been determined to improve his financial situation and was willing to do whatever it takes to achieve his goal. He might have seen scavenging through garbage dumps as a way to earn money and improve his life.

In conclusion, Saheb might have gone through garbage dumps for different reasons, including financial difficulties, desperation, hope, and determination.