Volumes through 1997 (Vol 132) held by Family History Library. Microfilm through Vol 49 may be ordered through the nearest Family History Center. This title continues Source:Historical Collections of the Essex Institute (Essex Institute) (i.e. the first volume is Vol. 9).
Volumes 9-58 (1868-1922) can be found at Google Books and Internet Archives. Links to each volume can be found on the Talk page.
Continued by the Peabody Essex Museum Collections from 1993-2004 (Vol. 129-138).
An Index to volumes 1-40 was published in 1905.
FHL film numbers