In fact, the 1857 census records (unindexed) are available online through Family Search.  They're organized by house number, but it's confusing because similar number sequences appear in different volumes, and, as a result, I had to search through multiple volumes even though I knew the relevant house number.  Here's a link:  https://www.familysearch.org/records/images/search-results?page=1&place=3460695&endDate=1857&startDate=1857&lifeEvent=105057.

Shalom Leaf