I recently listened to a podcast on Pickering's human-intensive computing

for processing astronomical data. Here is a wiki page that contains an overview and

photograph from 1890:

I am seeking diagrammatic workflow models of the types of computation that occurred

under Pickering's direction, but more generally, any articles or texts that contain such

diagrams for human computing.  I am familiar with modern formalisms such as 

BPMN: http://www.bpmn.org/ in which business workflows might be formalized. I also have 

read Grier's excellent book:

The history and cultural context is interesting to me, and most appropriate for engaging

readers, however, the main end-point in this story-telling process, for me, is for people to 

appreciate the path toward the diagrammatic formalisms with their nodes, merges, branches, and

connections.

If I need to, I can embark on a path toward creating some models with the written historical 

accounts as a guide, but I thought that checking here would be the best starting location in this 

quest for diagrammatic evidence.

-paul