Published in Bull. Essex Inst., in 1887, in volume 19, pages 1-12

Created: 2010-03-21, modified: 2012-05-11

Published in Bulletin of the Essex Institute, in 1887, in volume 19, pages 13-16

Created: 2012-05-11, modified: 2012-05-11

Published in Bull. Essex Inst., in 1887, in volume 19, pages 17-24

Created: 2010-03-21, modified: 2012-05-11

Published in Bull. Essex Inst., in 1887, in volume 19, pages 51-53

Created: 2010-03-21, modified: 2012-05-11