Studies on a modern population have shown that in only approximately
16 per cent of cases is the bone affected, and that in over half the cases
the ribs were affected (Stroud and Kemp 1993:223). Tumours
(technically called neoplasia) are not commonly found in archaeological
contexts and, when they are, they are normally benign. Although
interesting in themselves, there are few conclusions that can yet be
drawn from them.
Whereas tumours can reveal little about external influences, diet can
have a dramatic effect upon the skeleton and can show evidence of
dietary trauma (such as famine) or nutritional deficiencies. Rickets (see
above), is caused by a lack of vitamin D, and iron deficiency in the diet
has been widely recognised. Iron deficiency causes pitting to certain
bones (pitting of the orbit of the skull is called ‘cribra orbitalia’; to the
femur ‘cribra femora’; to the vault of the skull ‘parietal osteoporosis’).
Documentary research has suggested that iron deficiency, leading to
chronic anaemia, was widespread in the Middle Ages, as were parasitic
infections which aggravated the conditions (White 1988: 41–2).
One of the most useful indicators of diet is the mouth, and especially
the teeth. Differences in the coarseness of the food results in different
rates of attrition—gritty bread causes the teeth to wear down whilst soft,
refined food produces little attrition but may cause a build-up of
calculus. Chewing harder or more sinewy meat or food also reduced the
build-up of calculus. Sometimes different areas of one cemetery may
highlight the differences in diet, either between social groups or through
time. At St Andrew’s, York, the tenth to twelfth-century burials were
described as having ‘a fairly coarse unvaried diet of sinewy meat and
fibrous vegetables’, whereas the twelfth to fifteenth-century burials—
some of whom may have been monks—were described as having a
softer diet with less sinewy meat and more variety of vegetables and
cereals (Stroud and Kemp 1993:247). In at least one case the teeth may
also indicate that an ill child was cared for with a special diet for some
time, as calculus built up on the teeth indicated that this child was fed
with a soft diet for quite some time before death (Stroud and Kemp
1993:247).
A long time-span can also highlight changes in diet. At Rivenhall
there was a marked increase in caries and abscesses from the Saxon to
medieval population, which, it was argued, showed a change in diet that
caused a shift from alkaline mouth conditions to acid mouth conditions,
probably as a result of increased carbohydrate intake (for example from
sugars) or changing micro-organisms, or a combination of both
(O’Connor 1993: 100). Erosion of tooth enamel may also indicate some
DEATH AND BURIAL IN MEDIEVAL ENGLAND 131