Depends on who has copyright, i.e. whether it is too old to be out of the public domain or that whoever has it will not complain about someone using the picture.

Photobucket may work. I have had some trouble getting it to work but others on TOTV seem to have some success. You put it on Photobucket so that the link to it stays working.

You put it in through the Insert Image icon. Third from left on bottom of icon array.