I can assure my hon. and gallant Friend that very thorough investigation is in progress with a view to securing every possible economy of timber wherever it is used. In hutments that are now being built and for future hutment contracts the use of timber has been practically eliminated, being confined to doors and windows, except in the case of some Nissen huts. Full use is being made of such substitute materials as brick, coke breeze and concrete slabbing. Such timber as is used will, however, be of little subsequent use for other purposes.