* David K Smith points out that it's not quite Helvetica Narrow but agrees with me that it's definitely not Impact. I've seen it used in books printed in the Sixties but never seen a decent printer's typesetting description to verify the correct name of the fount (as we used to spell it).
The homepage has been reorganised as I've added too many new guides for them all to fit nicely. Most of the guides have been indexed under the new All Done with Mirrors (Aspects of Lambert) page, including the super-duper new guides: