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In contrast, the asymmetric, sawtooth pattern observed in section DLR7 is not readily apparent in section DLR7i. None-the-less it is still possible to identify regions where there is a marked pattern of variation for both T($\Delta$_{47}) and $\delta$^{18}O, Figure 5(b). Between 10 and 20, 55 and 60, and 65 and 75mm T($\Delta$_{47}) rises whilst there is an inverse fall in the $\delta$^{18}O value. Between 25 and 50mm in section DLR7i there is an apparent breakdown in the inverse relationship between T($\Delta$_{47}) and $\delta$^{18}O. In this region temperatures for the most part are greater than 70$^{\circ}$C whilst $\delta$^{18}O remains constant and close to -9.8‰_{VPDB}. As with section DLR7 the carbon isotope data does not show a marked covariation with either temperature or oxygen isotope composition. The exception is in the section between 10 and 20mm where there is a marked inverse relationship between $\delta$^{13}C and $\delta$^{18}O with a 2‰ positive trend in carbon isotope values matched by a 2‰ negative trend in the oxygen isotope values. This trend, however, is heavily levered by a single point with $\delta$^{13}C = 1.5‰_{VPDB} and $\delta$^{18}O = -7.5‰_{VPDB}.  Plotting the bulk isotope compositions composition of the two sections shows the vein to occupy a restricted range of $\delta$^{13}C and $\delta$^{18}O values between +1.5 to +3.7‰_{VPDB} and between -7 to -10‰_{VPDB} respectively, Figure 6(a). The plot has a degree of structure, but given the limited data set it is hard to determine the significance of this. For the most part $\delta$^{18}O and $\delta$^{13}C are decoupled with a horizontal band of data covering a range of $\delta$^{18}O between -8 and -10‰_{VPDB} and little or no variation in $\delta$^{13}C ($\approx$+3.5‰_{VPDB}). There is a subset of the data that shows a positive 1:1 correlation between $\delta$^{13}C and $\delta$^{18}O and an outlier of three points with relatively high $\delta$^{18}O values (-7 to -8‰_{VPDB}) and low $\delta$^{13}C values (1.5 to 2‰_{VPDB}).