Known, guessed and other:
1. Jensen 65
2. Mamod Minor 1
3. Four-cylinder oscillating engine which appears to have a reversing throttle valve, may be homebuilt from bar stock, but does look professional if not commercial!?!?
4. Similar to a small to medium sized horizontal Stuart ... but it is not.
5. Stuart 10H
6. & 7. About the size of a Stuart Victoria, or slightly bigger, but it is not.
8. Weeden 641
9. Stuart 7A & 10V
10. Stuart Boiler Feed Pump, very small single cylinder horizontal oscillator (likely homebuilt from bar stock), Model of a Worthington twin cylinder feedwater pump.
Some of these more advanced models could well have been built from casting "kits" by a home machinist and may have been from various sources.
Hopefully others with more specific knowledge of some of these engines, will chime in here soon with the needed information.