Source: Roger Watson; published in English Dance & Song, Summer 1983 Volume 45 Number 2
Formation: Circle Mixer, Men with their backs to the middle, facing Partner; Hornpipe Step Throughout
||Make an Alamo Wave: Right Hand to Partner, Left Hand to the person on the Left Diagonal:
Balance the Wave: Two Hornpipe Steps Forward, Two Backwards
Partner Allemande Right Half Way
Remake the Wave with a new person in the Left Hand:
||Poussette Out; Poussette In
Partner Swing - Slide Left to New Partner
||Repeat B1 with New Partner - finish by giving Right Hand to this New Partner
24 bar hornpipes. Roger recommended the two tunes below, giving a change of feeling half way through the dance.
Hornpipe Step: Step, Hop, Step, Hop...
"First Diagonal" is conventionally the person on the right diagonal. That would involve crossed arms in this dance and be very awkward, so I assume Roger meant the left diagnoal.
The wave needs to be made with extended arms at waist level so that there is room to dance forwards and back.