Found it My edition is the  small Penguin  reprint Where does Prebble quote this and who does he quote There are two index entries for Religion  Catholic  has the contributory cause section quoted above and  is a discussion of the last wave of emigration from Knoydart where They were Catholics for the most part However it and the subsequent pages dont seem to draw an obvious link between that and the motive for eviction which is presented as economic  I simply cant agree with your thesis which is that there was systematic antiCatholicism not recorded at the time despite antiCatholicism being common and widely seen as acceptable in the nineteenth century and not discussed by historians now but secretly hinted at instead for reasons that are clear to you and not to me