La Down Sella
Measure
[Dulwich 2nd XCIV]
Couples in procession
Intermediate

 
IA11-82 Doubles on left, right Signpost x22 doubles forward,
9-12Set left, right (sign)2 syngles syde,
13-16Double on lefta double foreward,
17-20Double back on rightReprince back
A2Repeat A1 on same sidetwyes
B11-4Singles on left, right Heart x22 singles foreward:
5-8Double on left, casting downcast of; a double rownd
B21-4Singles down on right, left twyes :
5-8Double on right, casting up
C11-4Singles on left, right Pavan, SSD x2 the pvyon, over,
5-8Double on left
C2Repeat C1 on other side
D11-44 Steps starting on left Four-ward and back x2travis 4 foreward ;
5-8Double back on leftreprince bace
D2Repeat D1 on other sidetwyse.
 

Reconstruction by Peter Durham, informed by feedback from Madrone dance practice participants. Transcription from The Shakespeare Society's Papers vol 1 (1844), Art. VII - "The passing measure Pavan" Illustrative of a Passage in Twelfth Night. By J. Payne Collier Esq, FSA.

Notes
Sources.  This dance only appears in one source: Dulwich College MSS, 2nd Series XCIV, fol. 28.
Music.  Anne Daye in "English Measures Old and New" in Historical Dance vol. 4 no. 3 (2018) notes that this dance and two others from the Dulwich Manuscript have matching tunes in the Mulliner book.
Recordings.  A recording of La Doune Cella from the Mulliner Book can be found on "Music from the Time of the Spanish Armada" by the York Waits.
Performance.  I suggest using Alman steps for this dance.