Analysis of To Mrs. Mary Caesar

I read in your delighted Face,
The Nuptial Bands are ty'd:
From me congratulate her Grace,
Young Portland's lovely Bride.

Tell her, an humble, artless Muse
Would hail the happy Pair;
But that, like Flow'rs by deadly Dews,
Her Strains are damp'd by Care.

Those whom the tuneful Nine inspire,
Have now a spacious Field:
To them I must resign the Lyre,
To none in Wishes yield.

May Prudence still the Fair attend,
Who, with distinguish'd Taste,
In Caesar early chose a Friend,
With ev'ry Virtue grac'd:

Who back a thousand Years may trace,
And her Descent maintain,
From Ademar's illustrious Race,
Ally'd to Charlemain.