A fully executed contract date begins once both parties signed it. In your case, since you signed them first, the date begins when the seller/affixes his signature. However, the delivery of the ratified contract should also be considered. Consult your realtor and a lawyer.
A group of spiders is called a cluster or clutter. Spiders belong to the group of animals called arachnids.
Brown Spiders (Loxoscelidae) are also known as the recluse spiders. The best known and most notorious member of this family is the brown recluse that has a violin-shaped pattern on the back of the front body segment. These spiders have only 6 eyes, while other spiders have 8.