See p.

31.)] [Illustration: FIG.10.DETAILED PLAN OF PART OF SILCHESTER.

Showing the arrangement of the private houses and the Forum and Christian Church.
(_From the plan issued by the Society of Antiquaries._) (See p.

31.)] The origin of these northern house-types has been much disputed.

English writers tend to regard them as embodying a Celtic form of house; German archaeologists try to derive them from the 'Peristyle houses' built round colonnaded courts in Roman Africa and in the east.