sim(8,9) = .9
sim(1,3) = .8
sim(6,7) = .75
sim(8-9,11) = .7
sim(1-3,2) = .6
sim(1-2-3,4) = .5
sim(8-9-11,10) = .4
sim(6-7,5) = .3
sim(1-2-3-4,5-6-7) = .2
sim(1-2-3-4-5-6-7,8-9-10-11) = .1

The entire process of single-link clustering is illustrated by a Dendogram that is based on the similarities between documents and other documents (or document clusters).