Sir – Caroline Pond (Letters, July 7) is mistaken about verbs. A word or phrase can look plural, but make better sense with a singular verb.

The exhibition at Woodstock is about one topic, war and children. Sylvia Vetta correctly implied that, for Jenny Lewis, the power and courage of women is one idea.

Synesis (as grammarians call it) isn’t getting more conspicuous. In 1611, they were happily writing ‘Thine is the kingdom, the power and the glory.’ And ‘the wages of sin is death.’ Nicholas Lawrence, Oxford