#  Digital Collections 

 



       ![partial view of a handwritten journal entry on yellowed paper](/sites/g/files/omnuum6411/files/styles/hwp_21_9__1920x825/public/2025-01/1768956i00223778.jpg?h=22ab9acf&itok=L7nJcoxa) 

 

 



 

 



 

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[Alexander Agassiz's Expedition and other images](https://images.hollis.harvard.edu/primo-explore/search?query=any,contains,alexander%20agassiz's%20expedition&tab=default_tab&search_scope=default_scope&vid=HVD_IMAGES&lang=en_US&offset=0)  
[Thomas Barbour Travel Images ](https://images.hollis.harvard.edu/primo-explore/search?query=any,contains,thomas%20barbour,AND&tab=default_tab&search_scope=HVD_MCZ_IMG&sortby=rank&vid=HVD_IMAGES&lang=en_US&mode=advanced&offset=0)  
[Burkhardt Collection](/burkhardt)  
[Burkhardt Scientific Drawings](http://nrs.harvard.edu/urn-3:hul.eresource:mczartco)  
[Thayer Expedition](/thayer)  
[Mayr Library Flickr](https://www.flickr.com/photos/66257786@N03/)  
[Mayr Library contributions to BHL Flickr](https://www.flickr.com/photos/biodivlibrary/collections/72157627662708468/)  
[Presentations](/conference-presentations)

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## Staff-only resources

[ ![calendar icon](/sites/g/files/omnuum6411/files/library/files/calendar_icon.png)

 ](https://outlook.office365.com/owa/Resource-Ernst_Mayr_Library@fas.harvard.edu/?realm=fas.harvard.edu&path=/calendar/view/WorkWeek)[EML Calendar](https://outlook.office365.com/calendar/Resource-Ernst_Mayr_Library@fas.harvard.edu/view/workweek)

[   ![potted plant icon](/sites/g/files/omnuum6411/files/styles/hwp_1_1__360x360_scale/public/library/files/wiki_icon.png?itok=9Rk5Xkns) 

 ](https://wiki.harvard.edu/confluence/display/MCZLibrary/Ernst%20Mayr%20Library%20and%20MCZ%20Archives%20Home)[EML wiki](https://harvardwiki.atlassian.net/wiki/spaces/MCZLibrary/overview)