1) "That" in this paragraph refers to "school". So the sentence says that it was wise that the school was situated at Renham. 2) I need some further context to be sure but perhaps there were 2 schools and when the new school opened in Renham, there was no need for the local school ("our school") to remain open as the children were capable of walking 3 miles to school (in Renham presumably).
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Ivanhr I need some further context to be sure but perhaps there were 2 schools and when the new school opened in Renham, there was no need for the local school ("our school") to remain open as the children were capable of walking 3 miles to school (in Renham presumably).So he probably means that he's happy that the new school was open in Renham, but at the sa