The cigars Loren passed out should have had cigar bands on them with government tax numbers.
The historical landmark idea would have also saved the Kissing Tree from being cut down.
Some of the ladies' pants have belt loops, but belt loops were not invented until 1922.
The book Colleen reads to Samantha is linen alphabet book by McLoughlin Brothers called A Child's First Book published in 1886.
The expedition was during Dr. Mike's birthday. She had said during the pilot episode that she was born in February. During the expedition episode she had said she was married for 6 months which would put her wedding in August (summer) not May (spring).