Solution to Sudoku no 723

Sudoku no 723 (Tough)

Our younger son created this sudoku using a Javascript program which he wrote himself:

Sudoku grader and solver

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Solution to Definition no 1

A purdonium is a coal scuttle made to look like an elegant piece of furniture. It has a removable metal lining to hold the coal. They were popular in the 19th century. I found the picture below on the Yola Gray Antiques web site:

Definition no 1

What is a purdonium?

(1) A musical instrument.

(2) A coal scuttle.

(3) An Australian flower.

(4) A steam engine.

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