What did they make leather out of in the Victorian times?

In Victorian times, leather was primarily made from animal hides, with cattle, sheep, and goats being the most common sources. The tanning process, which preserved the hides and made them durable, often involved the use of natural materials like tannin from tree bark. Additionally, advancements in technology during the Victorian era allowed for more efficient production and a wider variety of leather goods, from clothing to furniture.