Colin,

The 1919 Car Builders Dictionary and Cyclopedia has a drawing (unfortunately, not dimensioned) on Page 339 (Page 357 of the PDF available on-line from the University of Hong Kong at this link: http://ebook.lib.hku.hk/CADAL/B3139551X/ . The link takes you to the cover, then enter 357 in the "go to page" box and you will get the drawing. The same drawing may also be available in Train Shed Cyclopedia # 35 or #36 (parts 1 & 2 of "Freight Cars from the 1919 Car Builders Dictionary"). I was unable to access the on-line PDF of TCS #36 from Canada.

Cheers,
Greg Kennelly
Burnaby, BC
CANADA