Well, I think the original key of the London Bridge melody is D major, so I started the piece on an E, implying that the melody will be in the key of A major (since the melody starts on the fifth degree of the tonality it's actually in), the V of D. But that's not how I harmonize it. I purposely just constantly tried to find ways to throw wrenches into the listeners expectations with the harmony and melody, rhythmically as well. So the beginning harmony is an E major chord in 2nd inversion, but the bass then proceeds in patterns of it's own that are independent of the melody which starts in E major but actually uses a composite scale, contradicting it's own tonality with the inclusion of that E# on beat 3 of the first bar (and this is also a strategy I use later on where the right hand plays in 9ths). The bass wanders around up and down in major chords that constantly redefine the context of the upper harmonies. The 2nd quarter note of the first 7/8 bar implies a C major 9 #11, while the last three 8ths of that bar imply C# major #9. The independent rhythm of the bass and the melody also contribute to the feeling of chaos, and my intended "demented" mood. The last three 8ths of bar 4 are an elaboration of the final resolution of the original melody ("my fair lady") with an added third appended to it. In bar 5 I add yet another descending 3rd to this group setting up the variation you hear in beat 3 and 4 of bar 6. The harmony and rhythm in this bar is also an attempt to juxtapose contradictory tonalities (each hand arpeggiates a different chord) and tuplets (to make it sound more rhythmically busy with more events per beat then could have been afforded by only one subdivision of the beat). This basically covers the meat and bones of the approach I took to this piece I think. There's also the canonic imitation in bars 27 - 30 in which I basically just tried to surprise the listener by making each voice as rhythmically independent and jarring as possible almost never landing together on the same beat and using lots of syncopation. That's some of my thought behind how I wrote the piece but feel free to ask about specific parts if you want to know more!
Thanks! I've approached the theme and variations process/form in so many different ways by now I should be a pro, but this actually predates some theme and variations pieces I've written since which weren't as continuous and seamless as this! LoL This piece was written many years ago.
Thanks for being a great human being and for being willing to put in the time to help a friend! And I appreciate your championing my work so enthusiastically! Thanks for your review.