Question

Ha , this may save us a visit to Brixton road .Why did Holmes say this?​

Answer 1

Explanation:

The goose was sold to someone and it was becoming difficult to find the stone for holmes. Suddenly an idea pooped up to his mind that having just found out who had sold the Geese may save their visit to Brixton Road. He said this to Mrs. Oakshott of Brixton Road.

Answer 2

Answer:

As Holmes and Watson were making plans to contact Mrs. Oakshott (she was from Brixton Road), they heard a hubbub near Mr. Breckenridge. The goose seller was shaking his fists at a little-rat faced man who was whining that the goose was his.

Now, Holmes understood that the rat faced man was the one who had stolen the gem from the Countess of Morcar and this saved him from a visit to Brixton Road...