To show what Pompeii looked like in 1853, Mary Beard in her introduction to The Fires of Vesuvius: Pompeii Lost and Found points to "A Handbook for Travellers in Southern Italy by John Murray, Albermarle Street, "… to cater for the beginning of mass tourism (rather than Grand Tourists) to [Pompeii]."
Again, the book can be found on both at the Internet Archive (with Kindle capacity), A handbook for travellers in southern Italy; being a guide for the provinces formerly constituting the continental portion of the kingdom of the two Sicilies, and on Google Books.Pompeii starts at page 208.
The House of Pansa