From the rude stream into the bay;
There, locked up safe, she doth divorce
Her waters from the channel's course,
And scorns the torrent that did bring
Her headlong from her native spring, &c.
ll. 23-4.
calmely ride
Her wedded channels bosome, and then chide.
The number of MSS. and editions is in favour of 'there', but the quality (e.g. 1633 and W) of those which read 'then', and the sense of the lines, favour 'then'. The stream is at one moment in 'speechless slumber', and the next chiding. She cannot in the same place do both at once:
The current that with gentle murmur glides,