“…Sir -If an effect of sun exposure is the explanation for the late summer peak in diagnosis of nonmelanocytic skin cancers in the Oxford region (Swerdlow, 1985), and the previously observed winter deficit in their diagnosis in Houston, Texas (Freeman & Knox, 1970), then this pattern should be present, but shifted 6 months in the calendar (as it is for malignant melanoma; Holman & Armstrong, 1981), in the southern hemisphere. Figure 1 11.25, P=0.004; Edwards, 1961) and squamous cell cancer in men only (X2 = 6.66, P = 0.04).…”