Cover image illustrations

Dear Bill

The article about twinning (page 5 of Volume 7, No. 4) appeared in the November 1999 issue of Acta C (the reference is correct), but the Acta C cover shown is the October issue.

Dear Dr. Bolte

The miniature cover logos are a device to highlight the fact that the articles concern papers in the various IUCr journals. For the logos we used issues of the journals available in Buffalo at press time and did not mean to imply that the covers correspond to the issues in which the articles described appeared. Due to costs associated with processing illustrations, we may use the same logos repeatedly, for example, we use an old photo of me to save money and serve my vanity.