Sonnet
It was, however, Sir Philip Sidney's sequence "Astrophel and Stella" (1591) that started the English vogue for sonnet sequences. The next two decades saw sonnet sequences by William Shakespeare, Edmund Spenser, Michael Drayton, Samuel Daniel, Fulke Greville, William Drummond of Hawthornden, and many others. These sonnets were all essentially inspired by the Petrarchan tradition, and generally treat of the poet's love for some woman, with the exception of Shakespeare's sequence of 154 sonnets. The form is often named after Shakespeare, not because he was the first to write in this form but because he became its most famous practitioner. The form consists of fourteen lines structured as three quatrains and a couplet. The third quatrain generally introduces an unexpected sharp thematic or imagistic "turn", the volta. In Shakespeare's sonnets, however, the volta usually comes in the couplet, and usually summarizes the theme of the poem or introduces a fresh new look at the theme. With only a rare exception (for example, Shakespeare's Sonnet 145 in iambic tetrameter), the meter is iambic pentameter.
Hamnet Shakespeare
Michael Wood suggests in "In Search of Shakespeare" that sonnet 33 might have nothing to do with the so-called "Fair Youth" sonnets, that it alludes to the death of the poet's son, Hamnet in 1596 at age 11, and that there is an implied pun on ""sun"" and ""son"": ""Even so my sun one early morn did shine, with all triumphant splendour on my brow; but out, alack, he was but one hour mine, the region cloud hath mask'd him from me now"". If this is the case the link of sonnet 33 with sonnet 34, sonnet 35 and sonnet 36 would be entirely coincidental and spurious. Note that in sonnet 33 (1) there is no overt "you" or "thou" (contrary to most of the sonnets and in particular to sonnets 34, 35 and 36 which all three use "thou") and (2) there is no mention of the supposed "fault" committed by the addressee towards the poet (as in sonnets 34 and 35) nor of the supposed "guilt" borne by the poet which may affect the addressee's reputation (as in sonnet 36).