Berserk gaiden

Berserk gaiden summary:

A joke comic series drawn by the creator of Berserk but hardly has nothing to do with it. It gives some insight into the 97 anime production. The main characters are Miura and Puck who's there mainly to mess with Miura.
These chapters were published in multiple places and so are hard to find.
Chapters and where they were published:
1. 「ベルセルク外伝　真夜中の聖戦 」
1.1 Young Animal Issue #1 1998 (4Koma), December 26, 1997 (along with Berserk Chapter 112)
2. 「ベルセルク外伝２　奪われしパンドラの箱」 Young Animal Berserk Special Blitzkrieg Issue, May 5, 1998
3. 「ベルセルク外伝３　南海奇行ネオマンガ」Berserk Side Story 3 South Sea Eccentric Neo Manga | October 1998 / Berselk OFFICIAL SITE/shockwave or jpeg/15 | Link to the chapter is at the bottom of this blog entry from Miura (https://web.archive.org/web/19991104215944/http://www.hakusensha.co.jp/berserk/ken_diary02.html)
4. 「ベルセルク外伝４　電脳ジャッカー」 "Berserk Sword Wind Chronicles Complete Analysis Book", December 9, 1998, (97 anime art book)
4.1 Extra (webcomics?)