In looking at your photo, this is readily identifiable:
Thomas RE Accessory Drive.png
I presume your center pulley would be the water pump, and below it, the crank pulley. The last object beside the water pump does appear to be a fluid reservoir of some sort, as though it might supply a power steering unit.
I did some poking around and it appears that at least some of these may actually have an oddball gear-drive pump. I can only surmise and venture from that, that the shaft/gear arrangement goes through the timing cover and is driven by the timing gears. A strange setup, to be sure. Not sure how you're supposed to go about removing it. Here is a pic of one example.
Gear Driven PS Pump.jpg
Otherwise, I would look further below to see if it has a standard belt-driven pump down lower beside the crank pulley. Hope at least some of this leads you in the right direction...