A.D. 1371, pestilence was rife at Barcelona; and on the 3th of June, imprecatory processions were instituted in each of the parishes of that place on account of the pestilence, which lasted for one year. A comet was seen this year.
Edward Bascome, A history of epidemic pestilences from the earliest ages, 1495 years before the birth of our saviour to 1848: researches into their nature, causes, and prophylaxis (1851).
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Campmany Memorias históricas dice 13/6 http://books.google.es/books?id=cWYOAAAAQAAJ&pg=RA1-PA66