Hello,

 Thank you for reaching out!

This resource from NCSU is helpful: https://foodsafety.ces.ncsu.edu/power-outages/

Typically if foods have ice crystals and are as cold (40 degrees Fahrenheit) they are safe to keep. 

Please reach out if you have more questions.

Thanks for that information.  Because I needed to leave the house soon after I discovered the problem, I didn’t have time to examine everything in the packed freezer and closed the door securely then.  If some of the sorbet in a 3/4 empty container was still solid, can I safely assume that crystals were present there and in the various other types of food?

Seems like you were able to observe enough before running out of the house this morning.

Staying solid/seeing ice crystals likely means it stayed under 40F. We'd expect a half-full freezer to hold at a food-safe temperature (under 40°F) for 24 hours. As a reference, a full freezer up to 48 hours.