Less underground than expected

I thought I remembered that Lady Frederick Cavendish had travelled on the new underground railway soon after it opened in London 150 years ago today.

But it was not until 6 years later, after the Metropolitan line had been extended to the more fashionable area of South Kensington that she ventured into the depths:

Freddie [her husband] and I larked off to the S. Kensington Museum on foot, and thence to Portland Road by underground Railway; my first experience of it. It was charming and wonderful, and far less underground than I expected. Walked from the station to All Saints' Workhouse.

Links
Metropolitan line facts
Circle Line facts
Lady Lucy Cavendish
Related post
Lady Frederick Cavendish