Camden's Poem on Marriage of the Thames and Isis

I should esteem it a favour if any reader of the "Notes and Queries" would inform me where I can find a Latin poem of Camden's on the "Marriage of the Thames with the Isis." In his work styled *Britannia* (which was enlarged by Richard Gough, in 3 vols., fol. Lond. 1789), in vol. i. p. 169., under Surrey, Camden himself quotes two passages; and in vol. ii., under Middlesex, p. 2., one passage, from the above-mentioned poem. I have in vain made many endeavours to find the *entire poem*. I have examined the original work, as well as all the translations of *Britannia, sive Florentissimorum Regno…