    Senfence:’t: What, does Graham “Gwigg “propose.-about  the spread of disease?    Senterice 2: Archaeologist’ Barney’ ‘Sloane has: argued  that there is insufficient. evidence of, the. @xtinction:of a  large number.-of tals.'in the archaeological record . of  the medieval waterfront in: Lindon and that the plague  spread ‘oo qui¢ily: to support the thesis that the” Z.  <peslis: was'‘spigad’ from’ fleas. on rats; he -argues. that  transmission! must have: been person fo ‘person.