From the Dowland manuscript, this piece seems to be based on Kemp's Jig(Gigue，吉格舞曲，详见吉他学习—组曲中的4种常见舞曲类型（Allemande/Courante/Sarabande/Gigue/），), a popular tune of the time associated with Will Kemp, the famous English comic actor and dancer.
Suggested tempo is brisk, about 144 beats per minute.
It is important to release the third finger from the low C at this point to avoid an ugly clash with the upper C#. The change of key is somewhat sudden, but it is helped by stressing theC#.
The Parlement：Classical Guitar Scores，琉特琴与巴洛克吉他部分的第三首曲子，相关资料如下：