 Premise is: There's a lot of villas all the way along, but by degrees they seemed to get more and more thinned out, and in the end we got to one that seemed the last of the bunch.
Hypothesis is: There's a lot of huge villas all the way along, but they seemed to get more and more thinned out and bigger and bigger until we reached the largest and most secluded one that seemed to be the last.