Please edit it: From her gentleness and quietness...

[NewHopeR]

From her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking behind, which rendered me uneasy.

 

[bhaisahab]

From her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking behind, which rendered me uneasy.

It doesn't make sense.

 

[billmcd]

It doesn't make sense.

Use your imagination, or maybe not. :-|

 

[NewHopeR]

Hmm.. how about:

Behind her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking, which rendered me uneasy.
​

 

[Gillnetter]

Hmm.. how about:

Behind her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking, which rendered me uneasy.
​

You are after some sort of comparison here. I would start the sentence with something like, "In spite of her...".

 

[5jj]

Behind her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking, which rendered me uneasy.
​

I could accept that.

 

[Raymott]

Hmm.. how about:

Behind her gentleness and quietness, I smelt some tumultuousness and treacherousness lurking, which rendered me uneasy.
​

It's pretty awful stylistically with all those "-nesses". Sorry.
Also "smelt" doesn't sound right unless you're a dog.
" ... I detected some tumult and treachery, which made me uneasy."