void value not ignored as it ought to be

Delta_G:
If Paul had that in code tags you'd see that there is a couple of array indexes there that aren't showing up. Should look like:

 for(int i = 0; i < numberOfSensors; i++)

{ // Down here where it belongs!
    cs_sensor[i] = new CapacitiveSensor(capSenseSend,sensorPin[i]);
  }

Yes, tried this too. same error.

also tried:

 cs_sensor[i] = new CapacitiveSensor(capSenseSend,sensorPin[i]);

but this gave error: request for member 'setCurrentReading' in 'letters', which is of non-class type 'Letter [2]'