"hadst a look see" is a colloquial expression that means to take a quick glance or look. There are quite a few synonyms for this phrase, including "peeked", "checked out", "glanced at", "surveyed", "inspected", "examined", "scrutinized", "perused", "studied", "observed", and "viewed". All of these words convey the general idea of taking a brief look at something or someone. The choice of synonym depends on the context in which it is used and the level of detail required. However, all of them serve the purpose of conveying the intention of taking a quick look at something.