Clarissa abridged and unabridged

I recently found Clarissa by Samuel Richardson a Modern Library edition from 1950.

I want to read it but as I was logging it , to shelf it, I noticed online has it listed as an abridged version. It doesn’t have its dust jacket but inside I don’t see anywhere that confirms or contradicts this.

I would like to know which version this is to know if I’m reading the complete story or not. If anyone knows , it would be very much appreciated help & if more information is needed please let me know. Thanks!