《宋史·列传·卷六十四》
回京，恰逢朝廷诏令知制诰杨亿考试选拔人校对太清楼藏书，刘筠被选拔为第一名，以大理评事为秘阁校理。
还，会诏知制诰杨亿试选人校太清楼书，擢筠第一，以大理评事为秘阁校理。
When he returned to the capital, the imperial court had just ordered Yang Yi, the official in charge of drafting imperial edicts and decrees, to select and proofread books in the Taiqing Tower Library. Liu Yun was selected first and became a proofreader at the Imperial Library as a judge of Dali Temple.