Veritable Records of the Hongzhi Emperor (Ming Xiaozong shilu), juan 34-48 (Hongzhi 3, 1st month to Hongzhi 4, 2nd month), unproofread text at daizhige.org (from the Daizhige GitHub corpus)
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The court's daily record for 1490 has no stone fall and no mass deaths at Qingyang, though it has four of the Ming History's other five portents of that year