《明史·志·卷六十八》
弘治十五年冬天，尚书刘大夏推荐南京太常卿杨一清为副都御史，监督管理陕西养马政务。
十五年冬，尚书刘大夏荐南京太常卿杨一清为副都御史，督理陕西马政。
In the winter of the 15th year of Emperor Hongzhi’s reign, Minister Liu Daxia recommended Nanjing the Minister of Rituals, Yang Yiqing, as deputy censor in charge of the administration of horse breeding in Shaanxi.