Hi Tel
I did a search as you suggested and came up with this.
1999 183 4102 336 John Haining The Sissons Portable Engine in 2in. scale Boiler and associated components
1999 183 4108 688 John Haining The Sissons Portable Engine in 2in. scale Describes the valve gear
1999 183 4104 448 John Haining The Sissons Portable Engine in 2in. scale Describes the boiler feed pump and other details. Howard ploughing engine
1999 183 4100 212 John Haining The Sissons Portable Engine in 2in. scale Describes the boiler and smokebox. Early portable engines, boiler for the Sissons engine, suppliers
1999 183 4098 80 John Haining The Sissons Portable Engine in 2in. scale Sets the contemporary scene and describes the principal features. Early portable engines, the Sissons engine, Sissons of Gloucester, supplier
1999 183 4106 572 John Haining The Sissons Portable Engine in 2in. scale Deals with the screw-down regulator, describes his crankshaft building technique, cylinder block machining, crosshead guide and crank bracket. Patents, supplier
2000 184 4110 28 John Haining The Sissons Portable Engine in 2in. scale Describes the connecting rod and base, considers the configuration to suit the horses. Wheeled engine base, axles and axle mounts
2000 184 4112 154 John Haining The Sissons Portable Engine in 2in. scale Deals with final details, describes some barn machinery
Does any one have those issues or know where I can get them??
Cheers
Rich