According to Old Lady Hannah, her grandfather wasn't particularly famous or wealthy at the time, so the Canadian government's search efforts were half-hearted.
Although the search was said to have lasted for two months, it was limited to sending a telegraph to a few southern towns, and nothing else was done.
On the other hand, the $500 bounty offered by the Smith family at the time had a significant impact. Many indigenous people, gold diggers, and even Mounties joined the search effort, motivated by the substantial reward.
At least all of the clues related to Old Mr. Smith that the Smith family now possesses were found by these people, providing a clear direction for later search efforts.
With the help of the money obtained from Old Mr. Smith, the Smith family gradually began to rise and eventually became the true ruler of a large shipping company with businesses spanning the UK and the US.