Unrhymed hexameter, 'Intelligence', for [Mary] Somerville, by Sir John Frederick William Herschel Handwritten poem entitled 'intelligence' marked 'for Mrs Somerville', dated and signed by Herschel, with note 'by Sir John Herschel' at the back . The poem is twenty lines long and is a contemplation on the creation of the world, its physical properties and human intelligence. 10 April 1851