Thinking about details and 'minute particulars'

A detail noticed yesterday in the back yard of the Unitarian Manse in Cambridge

Click on the photo to enlarge it

From ‘Jerusalem’ by William Blake
Labour well the Minute Particulars: attend to the Little Ones;   
And those who are in misery cannot remain so long,           
If we do but our duty: labour well the teeming Earth.…   
He who would do good to another must do it in Minute Particulars.   
General Good is the plea of the scoundrel, hypocrite, and flatterer;   
For Art and Science cannot exist but in minutely organized Particulars,   
And not in generalizing Demonstrations of the Rational Power:           
The Infinite alone resides in Definite and Determinate Identity.   
Establishment of Truth depends on destruction of Falsehood continually,   
On Circumcision, not on Virginity, O Reasoners of Albion!