In A Nutshell
In 1603, Ben Jonson had a dream, a very strange dream. He was visiting a friend (Sir Robert Cotton) outside of London. There, as one of Jonson's friends later recounted, "he saw in a vision his eldest son, then a child and at London, appear unto him with the mark of a bloody cross on his forehead, as if it had been cut with a sword; at which amazed he prayed unto God, and in the morning he came to Mr. Camden's [another friend of Jonson's who was with them] chamber to tell him, who persuaded him it was but an apprehension of his fantasy at which he should not be dejected."
See? We told you it was weird. Know what's weirder? Jonson's friend was wrong. Letters soon arrived, informing Jonson of the non-dream death of his eldest son at the hands of the plague (sometimes referred to as the "pest"). Bad times.
In response to his son's untimely death, Jonson composed this short poem "On My First Son." Nobody is entirely sure when he wrote the poem, but it must have been shortly after his son's death and burial. The poem laments the death of Jonson's son and expresses what appears to be Jonson's feelings of profound sadness. (A poem that commemorates a dead person and laments their death is called an elegy, and there are many famous elegies in English. See our module for "Lycidas" for one important example.)
Even though Jonson wrote the poem shortly after his son's death, he didn't publish it until 1616, when he issued a collection of his works. In that collection, he sorted his poems into smaller groups. "On My First Son" appears in a group of poems called Epigrams. (Epigrams are generally short and memorable little poems, usually only a few lines long.) Although it's not a very long poem, it deals in great depth with the poet's tremendous grief and loss. In just a few lines, Jonson packs a powerful punch.