These are the illustrations for the children’s book, The Quest of the Hammer, from The Home Adventure Library (Volume 7): Great Stories From World Literature, written by Abbie Farwell Brown, compiled by Doris Heitkotter, illustrated by John Everds, copyright of The Southwestern Company, 1968.
For anyone who doesn’t know the story, Thor’s hammer Mjolnir gets stolen by a Giant named Thrym.
When Loki flies out and discovers the thief, Thrym states that he will only give back the hammer if the beautiful Freya will become his bride.
Loki then persuades Thor that he should stand in for Freya and be the Giant’s “bride.”
“Freya” surprises the wedding party by eating and drinking everyone else under the table. Of course, Thor and Loki end up slaying the Giants and get the hammer back (after getting their bellies full).