is typical of an "italian" sonnet. however, the rhymes of the sestet in an italian sonnet can vary widely: cdcdcd, cddcdd, etc. the scheme abba abba cde edc is very rarely, but its ending sequence cde edc was probably the source for robert browning's stanza abccba. it was used in the poem "meeting at night". another pattern is spenserian sonnet, invented by edmund spenser. it runs a-b-a-b, b-c-b-c, c-d-c-d, e-e.